B2evolution - Blog solution - Publishing
B4class - Group & video chat, scheduling, photo sharing & tutoring - Community
Babamix - Upload, mix & share your media - Dead, Multimedia
Babble - Word game community - Gaming
Babelgum - Create your own tv channels over IP - Video
Babelplex - Search simualtaneously in 2 languages - Search
Backbase~* - Ajax applications - Software
Backfence - Publish & share community news - Rating
Backflip - Social bookmarking - Bookmarking
Backgroundimagemaker - Create backgrounds - Design
Backseatplayground - ARG using GPS for gameplay in real world (documentary video) - Gaming
Backtags - Enter your domain name or tags & get your site's status on bookmarking sites - Stats
Backupreview - Indexes hundreds of local & international back-up & storage companies - About
Badged - Add your social networking badges to your blog - Community
Badongo - Store & share your media - Storage
Baeboo - Shop comparison - Ecommerce
Bagborroworsteal - Get a handbag each month for a few bucks & let it circulate - Economy
Bakespace - Recipe sharing community for cookers & cakers - Community
Ballbug - Memeorandum for baseball - News
Ballhype - Explore, discuss & vote on sports news - Rating
Bandbuzz - Explore & rate music playlists - Rating
Bandchemistry - Find band members or a band to play in - Recruiting
Barablu - Free or cheap calls, IM, chat etc. thru mobile & web - Communicating
Barcamp - Ongoing interactive event - Knowledge
Barcardz - Network in real life - Community
Baresite - View websites fast & easy with your mobile - Browser
Barewiki (now: Ottowiki) - Make a wiki in seconds - Dead, Publish
Barks - Social bookmarking for news - Bookmarking
Barracudasuite - Manage your retail business from anywhere - Productivity
Basecamp* - Manage your projects - Productivity
Bashr - Wikipedia, Flickr & Delicious mash-up - Search
Basil - Web analytics solution - Stats
Battleofconcepts~ - Help companies to innovate or solve problems; and win - Economy
Battleout - Challenge & vote for best, biggest etc. whatever - Community
Bayimg - Upload, store & manage your photos - Photo
B-boys - Submit & rate hiphop - Rating
Bbpress - Publish & manage your forum - Communicating
Bconnections - CRM solution - CRM
Bea* - AquaLogic enterprise social computing suite - Software
Beagoodbuzz - Post & share good buzzes - Marketing
Beaguide - Make money on writing articles - Economy
Beamfile - Email big files - Office
Beanrocket - News reader - RSS
Beast - Rails-based forum solution - Software
Beatport - Music download store - Audio
Bebo - Find back school & college friends - Community
Bebop - Compare music calendar against your iTunes catalogue - Audio
Become - Collective shopping search - Search
Bedesk - Social desktop - OS
Bedsharing - Get a bed when travelling (well designed variation on Couchsurfingcom) - Economy
Beedeo - Upload & share videos - Dead, Video
Beenverified - Have your identity verified, your credentials validated & promote yourself - Identity
Beeplet~ - Set up reminders & get alerts - Dead, RSS
Beetagg - Scan branded sema code with your cell to get access to website - Marketing
Beetobee - Digg what works in B2B marketing (also offers solution for enterprise 'thought leadership communities' - Rating
Beggr - Give me your money - Finance
Begreen - Here it's easy being green - Community
Beinsync - Backup & access all files anywhere - Storage
Berecruited - College recruiting & athletic scholarship network - Community
Bessed - Search & blog - Search
Bestofbest - Categorized best of best 2.0 websites - About
Bestvotexxx - Submit & rate porn - Rating
Betabug - Bug tracking community - Software
Betafy - Get alerts about new Web 2.0 companies - Dead, About
Betamarker - Digg software - Rating
Beta-portal - Portal to Web 2.0 companies - About
Betbug - Betting exchange - Gambling
Betbull - Betting exchange - Gambling
Betbutler (now Danbook.com) - Betting exchange - Dead, Gamble
Betdaq - Betting exchange - Gambling
Betfairgames - Bet on poker and blackjack games - Gambling
Betfairpoker - Poker community - Gambling
Betfanatic - Betting exchange - Dead, Gamble
Betmate - Betting exchange - Gambling
Betocracy - Create your own decision markets - Gambling
Betonbet - Bet on sports, poker & casino games - Gambling
Betsgowild* - Cash-free betting community - Gambling
Betsson - Betting exchange, poker & casino tournaments - Gambling
Betterdesktop - Share usability tests - Design
Bettingmarket - Article on P2P betting - About
Bettr - Vote on best Flickr photos - Dead, Images
Betxc - Betting exchange - Dead, Gamble
Beyond** - Career management software, facilitating 15,000 niche sites & job boards - Recruiting
Biblica - Publish & share texts - Publishing
Bibliochat - Get book excerpts and reviews, and discuss books - live - Community
Bibliophil - List your books & share - List
Bibme** - Build a bibliography on the web - Data
Bibsonomy - Share bookmarks & literature lists - List
Bibster - Search, share & manage bibliographic metadata - Search
Biddingbuddies - Meet other eBayers through friends, groups, shared bookmarks, blogs & events - Ecommerce
Bidster - Buy by placing the lowest unique bid - Ecommerce
Bidvertiser - Make some money on accepting ads on your blog or website - Marketing
Big - Big search results - Search
Bigbluesaw - Submit cad design & get product delivered - Personal manufacturing
Bigcartel - Start, review & recommend online shops - Ecommerce
Bigcite - Publish & share quotes - Publishing
Bigcontact - Publish your videos & mp3s - Multimedia
Bigcontacts - Upload, annotate & share your contacts - Office
Bigfilebox - Store & share - Storage
Bigfilez - Store & send - Storage
Biggerboat - Search entertainment - Search
Biginjapan - Social media tools - Software
Bigoven - Publish & share recipes - Publishing
Bigstockphoto - Upload your images, have them reviewed & sell them - Photo
Bigupload - Store & send - Storage
Billhighway - Budget, collect, pay between roommates, fraternities, etc. - Finance
Billingorchard - Billing solution - Finance
Billmonk - Manage debts - Finance
Billmyclients - Invoicing solution - Finance
Billq - Keep track of your bills - Finance
Billster - Track where your money goes - Finance
Binarylaw - Submit & rate legal news - Rating
Binexx - Bet on stocks - Dead, Gamble
Bioteams* - Blog on team dynamics & virtual collaboration - About
Birthdayforever - Manage & share your wishlist & photos - List
Bitbomb - Web2sms reminders - Office
Bitlbee - IRC clients using IM protocols - Communicating
Bitsofnews - Submit, read, rank & discuss news - Rating
Bittercyclist - Bicycle accident map & community; map mash-up - Geo
Bittorrent - Share files & bandwidth - Office
Bitty - Embed content from web services - Publishing
Bitweaver - Content management system for communities and enterprise - Software
Bitwine - Get or give video advice for a price - Knowledge
Bitwise - Encrypted instant messaging - Communicating
Bix* - Create & vote for content, and win - Multimedia
Bixee - Job finder - Recruiting
Biznik - Business network - Community
Bizwiki - Uk social directory guide - Marketing
Bizzbites - Submit & rate business news - Rating
Blabb - Social bookmarking - Dead, Bookmark
Blabberize - Create & share talking pictures - Photo
Blablalist - Manage tasks - Office
Blabline - Search podcasts - Search
Blackarrow - Video ad management system - Marketing
Blackplanet - Community for African-Americans - Community
Blast - Promote your site for free - Marketing
Blastfeed - Only get the feeds that matter to you - RSS
Bleep - Music download store - Audio
Blendsforfriends - Order your own blend of tea - Ecommerce
Blerts - Graphics-based desktop RSS alert app - RSS
Bliin~ - Share your experience in photos, videos, text etc - Geo
Blinkbits - Share knowledge - Knowledge
Blinkcart - Put a shopping cart on any page & make some money - Marketing
Blinkist - Social bookmarking - Bookmarking
Blinklife*** - Social email - Communicating
Blinklistsocial - Lists of 2.0 websites - About
Blinkr - Digg design - Rating
Blinksale - Web-based invoicing - Finance
Blinkx - Search multimedia - Search
Blinkxsearchus - Personalized epg - Video
Blip - Get video & podcasting on your blog - Publishing
Blipfoto - Publish your phlog - Publishing
Blipstar - Create your own store locator - Geo
Blish - Buy or sell your media - Ecommerce
Bliss - Customize game to couple’s needs - Gaming
Blnk - Publish & share your profile and make new friends - Community
Blobber - Communicate with other site visitors - Communicating
Blockhunter - Find, sell or let a home & avoid real estate agents - Ecommerce
Blockrocker - Buy & sell thru classifieds; map mash-up - Ecommerce
Blocksavvy - Habbo for adults - Gaming
Blog - Publish your blog - Publishing
Blogabond - Publish your travel blog (map mash-up) - Publishing
Blogads - Make some money on accepting ads on your blog or website - Marketing
Blogbackuponline - Backup service - Storage
Blogbar - Searches your blog and the web - Search
Blogbeat (acquired by Feedburner) - Compare websites' Alexa rankings (formerly known as Alexaholic) - Dead, Stats
Blogbridge - Feed reader - RSS
Blogburner - Write a blog, and get a rev share - Economy
Blogburst - Syndicate blogs to mainstream media sites - Publishing
Blogbuy - Social market place - Dead, Ecommerce
Blogbuzzmachine - Blog search - Search
Blogcatalog - Blog directory - Search
Blogcheese - Publish video on your blog - Video
Blogcode - Start blog & find similar ones - Publishing
Blogdex - Folksonomied blog topics selection - Dead, News
Blogdigger - RSS feed directory - RSS
Blogelo - Rate & share websites - Bookmarking
Blogetery - Publish your blog - Publishing
Blogexpress - Feed reader - RSS
Blogflux - RSS ping tool - RSS
Blogger - Publish your blog - Publishing
Bloggerkit - Let Amazon exploit your blog - Ecommerce
Bloggersnap - Add your webcam snapshot to any blog - Publishing
Bloggerwave - Make money on writing reviews on your blog - Economy
Bloggingads - Make some money on accepting ads on your blog or website - Marketing
Bloggoggle - Categorize & rate pro bloggers - List
Blogher - Blogging community for women - Publishing
Bloginfluence - Let your art compete with other artists' submissions - Rating
Blogitive - Make money on writing articles on your blog - Economy
Blogladder - Create & maintain your blog - Publishing
Bloglebrity - Compute your blog's influence - Fun
Bloglet - Blog update notifications thru email - Publishing
Bloglines - RSS readers (web based, mobile) - RSS
Blogmailr - Use email to send blogposts - Publishing
Blogmarks - Social bookmarking - Bookmarking
Blogmemes - Vote for & share memes - Rating
Blogmusik - Explore music - Audio
Blogniscient - Rate your influence in the blogosphere - Rating
Blogoforum - Categorize your forum by tagging - Communicating
Blogprinting - Publish, print & sell it - Publishing
Blogpulse - Search blogs - Search
Blogr - Publish & share your media - Publishing
Blogreporter - Submit & rate blog articles - Rating
Blogrovr - Get links to context relevant blog articles while you're browsing - Search
Blogrox - Publish your blog (Wordpress) - Publishing
Blogrush - Sydicate your blog content, add widget to your blog & get more visitors - Marketing
Blogs - Notification2email - Publishing
Blogscope - Blog analytics software - Data
Blogsieve - RSS mixer - RSS
Blogsitter - Find (or offer yourself as) a blog co-publisher - Publishing
Blogsome - Publish your blog (Wordpress) - Publishing
Blogspirit - Blog solution - Publishing
Blogster - Free blog & image hosting - Publishing
Blogsticker - Put a sticker to your blog - Publishing
Blogstickr - Add fake stickers to your blog - Fun
Blogstreet - RSS feed directory - RSS
Blogsvertise - Make money on writing articles and reviews on your blog - Economy
Blogtalkradio - Host your own phone-in talkradio show online - Audio
Blogtelevision - Search videos in blogosphere - Video
Blogtoprofit - Make money on writing articles and reviews on your blog - Economy
Blogtronix - Blogging & corporate community software - Community
Blogtv - Live video cast tool - Communicating
Blogyx - Publish your blog - Publishing
Bloki - Publish your blog - Publishing
Bloodee - Digg horror - Rating
Blosker - Submit & rate strange & naughty news - Rating
Blotter - Graph your blog's popularity - Software
Bloxor - Maintain & use your blogroll online - Publishing
Blubbry - Publish, share or listen to pod & vodcasts - Multimedia
Bluebuzzard - Hospitality sales & marketing management solution - Productivity
Bluechipexpert - Profile yourself, invite friends & recruit other professionals, and get paid - Recruiting
Bluedot (formerly: Blue) - Find & share - Search
Blueform - Design your forms - Office
Bluegrind - Have your personal news anchor reading the news to you - News
Bluemountainarts - Submit your poems & get paid if they use it for greeting cards - Economy
Bluenotenetworks - VoiP solution for tele-workers, remote offices & suppliers - Communicating
Bluepuddle - Create & enrich maps - Dead, Geo
Bluepulse - Internet 2 cell phone - Communicating
Blueshoes - PHP app framework, plus CMS - Software
Bluesmiley - Manage your online life - Software
Bluetie - Collaborative Office-like toolkit - Productivity
Bluevex - Bet on sports & stocks - Dead, Gamble
Blufr - Multi-player trivia knowledge game - Dead, Game
Blummy - Manage your bookmarks - Bookmarking
Blurb - Turn your blog into a book - Publishing
Blursoftmetaforum - Forum solution - Software
Bmaccess - Social bookmarking with thumbs - Bookmarking
Boardreader - Forum & bulletin board search engine - Search
Boardtracker - Search forums - Search
Bofunk - Pick up content for your blog - Multimedia
Bok - Call long distance & international for a few cents (USA & Canada) - Communicating
Bolt - Watch, upload & share media - Storage
Bondd*~ - Call for free, get advertising - Communicating
Boo - Search , compare, share or buy trips - Ecommerce
Boober~ - Get or bid for giving loans - Finance
Boo-box - Add shopping links to your postings & make money on them - Marketing
Bookalesson - Matching service for instructors & students - Recruiting
Bookjetty - Catalog, tag, rate & review books, and check their availability in 300 libraries - Data
Bookmarkme - Help create & download bookmarks - Dead, Bookmark
Bookmarktracker - Social bookmarking - Bookmarking
Bookmooch - Exchange old books - Community
Bookr - Create & share photobook with Flickr images - Photo
Bookrevyoo - Social book review community - Community
Booksconnect - Community for readers, authors, publishers, librarians & booksellers - Community
Booksforschool - Buy & sell used text books - Ecommerce
Bookswellread - Publish & share book reviews - Publishing
Boomp3 - Upload & share your music - Audio
Boompa - Show your rides & find guides & parts to improve them - Economy
Boomtrek - Search for & contribute to mapped travel destinations - Search
Bordee - Instantly create message board for your page - Software
Boredwealth - Get paid to surf ("Alladvantage.com resurrected") - Economy
Bottomfeeder - RSS reader (cross platform) - RSS
Bouldr - Share climbing (map mash-up) - Community
Bouncefind** - Pleasantly designed search engine - with public API - Search
Bountee - Design, buy & sell T's - Ecommerce
Box - Store & share data - Storage
Boxbe - Use as your public address, let advertisers pay to reach you - Communicating
Boxcloud - Store & send - Storage
Boxed* - Build calendars out of all sorts of online sources - Office
Boxstr - Store & share - Storage
Boxxet - Personalize your incoming content - Startpage
Bozpage - Web 2.0 sources - About
Braincast - Voicemail2web - Communicating
Brainjams - Share knowledge & collaborate on ideas - Dead, Knowledge
Brainkeeper - Capture, distribute & collaborate on corporate knowledge - Knowledge
Brainreactions - Participate in brainstorms & share ideas - Knowledge
Brandgossip*~ - Find what people say about your brand - Search
Brands20 - Traditional brands in 2.0 design style - Fun
Bravenet - Publish your blog - Publishing
Break - Upload, explore, rate & share comedy videos - Video
Breakinglocals - Local artists and fans community - Dead, Audio
Breeze - Email marketing solution - Communicating
Brickfish* - Submit, vote for & review content, and get rewarded for it - Publishing
Brightcove - Upload, explore, rate, share & syndicate videos - Video
Brightroll - Monetize your video traffic with commercials - Marketing
Brilliantbuttonmaker - Button maker - Design
Bringalink - Submit better links on front page articles' content - Dead, Bookmark
Bringr - Submit & rate women's special interest articles - Rating
Bringsome - Ask the world to bring you some, or bring something to someone else - Community
Brinkpad - Create, edit & share your presentations - Office
Britepic* - Add extra content & intelligence to your online pics - Photo
Britney - Recommend, publish & digg next big hits - Rating
Briz - RSS reader (Windows) - RSS
Broadbandgenie - Find best provider - Ecommerce
Broadbandsports - Upload, explore, rate & share sports videos - Video
Broadclip - Crawl the web for your music, clip it & get it delivered to your player - Audio
Broadmining - Meta search - Dead, Search
Broadramp - Multimedia management solutions - Software
Broadsnatch - Share multimedia - Multimedia
Brokenotbeat - Donate to a needy person each day - Dead, Economy
Browse3D - 3D web browser - Browser
Browsershots - Test your site in different browsers - Software
Browster - Search & browse instantly - Search
Browzar - Surf anonymously - Browser
Brusheezy - Photoshop brushes for download - Design
Bryght - Create & maintain a community - Software
Bstir - Serve a random posting from your archive - Publishing
Btbot - Search bittorrents & ringtones - Search
Btopenzone - Search & connect to wi-fi hotspots - Wi-fi
Bttlxeforum - Bulletin board solution - Software
Bubble20snarkgroup - Everything against Web 2.0 - About
Bubbleguru - Record & publish your videos (featuring you) - Publishing
Bubbleply - Add bubbles to media & share them - Video
Bubbles - Launch frequently used sites in your system tray from a light browser (download) - Browser
Bubbleshare - Phlog, share, add audio captions - Multimedia
Bubblesnaps - Add balloons to your pics & share them - Publishing
Bubblr - Create & share photo strips - Publishing
Bubblus - Brainstorm together online - Knowledge
Buddymapping - Assemble your friends on a map & publish it - Geo
Buddymarks - Social bookmarking - Bookmarking
Buddymedia - PSP for Facebook's Ace Bucks - VAS
Buddyping - Find friends & events locally (map mash-up) - Office
Buddystumbler - Search for new buddies to chat with over IM - Communicating
Budgetpulse - Manage your budget - Finance
Budgettracker - Track your finances - Finance
Bugja - Bug tracking for ninjas - Software
Bugjuice - Track bugs - for groups - Software
Buglabs - Build your own hardware - open source consumer electronics platform - Personal manufacturing
Buildhardlink - Link to physical objects & access data over your cell phone - Geo
Builtsmarter - Modular site (re)construction software - Software
Bulletads - Make some money on accepting ads on your blog or website - Marketing
Bulletin* - Share data & mash them up with geo information - Dead, Geo
Bulletprooflinks - Share tutorials, tools & templates - Design
Bullpoo - Find, share & collaborate on investment information - Finance
Bunchball - Play games with your friends - Gaming
Burstcast - Upload & share photos - Photo
Businessitonline - Collaboration tools - Productivity
Business-planet - Submit & rate business news - Rating
Businesssoftware - Article on running a business on Web 2.0-based software - About
Bustaname* - Domain name checker - Search
Busythumbs - Post & share text & photos from cell to blog - Publishing
Busytonight - City guide wiki - Publishing
Butlerbob~ - Advertise, find, book & buy concierge services - Ecommerce
Butterfat - Traceroute map mash-up - Communicating
Butterfly~ - Bookmark & annotate - Bookmarking
Buttonator - Drag, drop & share web buttons - Design
Buttonbrowser - Button gallery and button maker - Design
Buttonmaker - Create buttons with a few clicks - Design
Buurtlink~ - Find people, places & news in your hood - Community
Buxfer - Keep track of shared costs - Finance
Buymyprofile - Buy or sell ad space on profile pages - Dead, Marketing
Buymytronics - Sell your used, new or broken electronics today - Ecommerce
Buyyourfriendadrink - Buy or redeem drinks thru cell phone code - Economy
Buzka - Social bookmarking - Bookmarking
Buzzchurch - Community & forum for music makers - Audio
Buzzdash - Create & share polls - Survey
Buzzfeed - Memetracker goes Boingboing - News
Buzzillions - Buy & review products - Ecommerce
Buzzingo - Buzz notifier (Yahoo + Feeling Lucky mash-up) - News
Buzzlogic - Monitor, map, measure & manage your rep in social media - Identity
Buzznet - Share videos & photos - Multimedia
Buzzshout* - Review & rank Web 2.0 companies - About
Buzzvote - Conduct polls - Survey
Buzzwire - Explore, create & share video & audio on your mobile - Multimedia
Buzzword - Work on documents together (acquired by Adobe) - Productivity
Buzzwordhell - Rate & condemn - Fun
Byoms - Personalized IM search agents on your cell - Search
Bytemycode - Submit & rate code snippets - Rating
Bzzagent - Create word of mouth by sampling among buzzervolunteers - Marketing
Bzzster - Recommend links to your friends - Bookmarking
B4class - Group & video chat, scheduling, photo sharing & tutoring - Community
Babamix - Upload, mix & share your media - Dead, Multimedia
Babble - Word game community - Gaming
Babelgum - Create your own tv channels over IP - Video
Babelplex - Search simualtaneously in 2 languages - Search
Backbase~* - Ajax applications - Software
Backfence - Publish & share community news - Rating
Backflip - Social bookmarking - Bookmarking
Backgroundimagemaker - Create backgrounds - Design
Backseatplayground - ARG using GPS for gameplay in real world (documentary video) - Gaming
Backtags - Enter your domain name or tags & get your site's status on bookmarking sites - Stats
Backupreview - Indexes hundreds of local & international back-up & storage companies - About
Badged - Add your social networking badges to your blog - Community
Badongo - Store & share your media - Storage
Baeboo - Shop comparison - Ecommerce
Bagborroworsteal - Get a handbag each month for a few bucks & let it circulate - Economy
Bakespace - Recipe sharing community for cookers & cakers - Community
Ballbug - Memeorandum for baseball - News
Ballhype - Explore, discuss & vote on sports news - Rating
Bandbuzz - Explore & rate music playlists - Rating
Bandchemistry - Find band members or a band to play in - Recruiting
Barablu - Free or cheap calls, IM, chat etc. thru mobile & web - Communicating
Barcamp - Ongoing interactive event - Knowledge
Barcardz - Network in real life - Community
Baresite - View websites fast & easy with your mobile - Browser
Barewiki (now: Ottowiki) - Make a wiki in seconds - Dead, Publish
Barks - Social bookmarking for news - Bookmarking
Barracudasuite - Manage your retail business from anywhere - Productivity
Basecamp* - Manage your projects - Productivity
Bashr - Wikipedia, Flickr & Delicious mash-up - Search
Basil - Web analytics solution - Stats
Battleofconcepts~ - Help companies to innovate or solve problems; and win - Economy
Battleout - Challenge & vote for best, biggest etc. whatever - Community
Bayimg - Upload, store & manage your photos - Photo
B-boys - Submit & rate hiphop - Rating
Bbpress - Publish & manage your forum - Communicating
Bconnections - CRM solution - CRM
Bea* - AquaLogic enterprise social computing suite - Software
Beagoodbuzz - Post & share good buzzes - Marketing
Beaguide - Make money on writing articles - Economy
Beamfile - Email big files - Office
Beanrocket - News reader - RSS
Beast - Rails-based forum solution - Software
Beatport - Music download store - Audio
Bebo - Find back school & college friends - Community
Bebop - Compare music calendar against your iTunes catalogue - Audio
Become - Collective shopping search - Search
Bedesk - Social desktop - OS
Bedsharing - Get a bed when travelling (well designed variation on Couchsurfingcom) - Economy
Beedeo - Upload & share videos - Dead, Video
Beenverified - Have your identity verified, your credentials validated & promote yourself - Identity
Beeplet~ - Set up reminders & get alerts - Dead, RSS
Beetagg - Scan branded sema code with your cell to get access to website - Marketing
Beetobee - Digg what works in B2B marketing (also offers solution for enterprise 'thought leadership communities' - Rating
Beggr - Give me your money - Finance
Begreen - Here it's easy being green - Community
Beinsync - Backup & access all files anywhere - Storage
Berecruited - College recruiting & athletic scholarship network - Community
Bessed - Search & blog - Search
Bestofbest - Categorized best of best 2.0 websites - About
Bestvotexxx - Submit & rate porn - Rating
Betabug - Bug tracking community - Software
Betafy - Get alerts about new Web 2.0 companies - Dead, About
Betamarker - Digg software - Rating
Beta-portal - Portal to Web 2.0 companies - About
Betbug - Betting exchange - Gambling
Betbull - Betting exchange - Gambling
Betbutler (now Danbook.com) - Betting exchange - Dead, Gamble
Betdaq - Betting exchange - Gambling
Betfairgames - Bet on poker and blackjack games - Gambling
Betfairpoker - Poker community - Gambling
Betfanatic - Betting exchange - Dead, Gamble
Betmate - Betting exchange - Gambling
Betocracy - Create your own decision markets - Gambling
Betonbet - Bet on sports, poker & casino games - Gambling
Betsgowild* - Cash-free betting community - Gambling
Betsson - Betting exchange, poker & casino tournaments - Gambling
Betterdesktop - Share usability tests - Design
Bettingmarket - Article on P2P betting - About
Bettr - Vote on best Flickr photos - Dead, Images
Betxc - Betting exchange - Dead, Gamble
Beyond** - Career management software, facilitating 15,000 niche sites & job boards - Recruiting
Biblica - Publish & share texts - Publishing
Bibliochat - Get book excerpts and reviews, and discuss books - live - Community
Bibliophil - List your books & share - List
Bibme** - Build a bibliography on the web - Data
Bibsonomy - Share bookmarks & literature lists - List
Bibster - Search, share & manage bibliographic metadata - Search
Biddingbuddies - Meet other eBayers through friends, groups, shared bookmarks, blogs & events - Ecommerce
Bidster - Buy by placing the lowest unique bid - Ecommerce
Bidvertiser - Make some money on accepting ads on your blog or website - Marketing
Big - Big search results - Search
Bigbluesaw - Submit cad design & get product delivered - Personal manufacturing
Bigcartel - Start, review & recommend online shops - Ecommerce
Bigcite - Publish & share quotes - Publishing
Bigcontact - Publish your videos & mp3s - Multimedia
Bigcontacts - Upload, annotate & share your contacts - Office
Bigfilebox - Store & share - Storage
Bigfilez - Store & send - Storage
Biggerboat - Search entertainment - Search
Biginjapan - Social media tools - Software
Bigoven - Publish & share recipes - Publishing
Bigstockphoto - Upload your images, have them reviewed & sell them - Photo
Bigupload - Store & send - Storage
Billhighway - Budget, collect, pay between roommates, fraternities, etc. - Finance
Billingorchard - Billing solution - Finance
Billmonk - Manage debts - Finance
Billmyclients - Invoicing solution - Finance
Billq - Keep track of your bills - Finance
Billster - Track where your money goes - Finance
Binarylaw - Submit & rate legal news - Rating
Binexx - Bet on stocks - Dead, Gamble
Bioteams* - Blog on team dynamics & virtual collaboration - About
Birthdayforever - Manage & share your wishlist & photos - List
Bitbomb - Web2sms reminders - Office
Bitlbee - IRC clients using IM protocols - Communicating
Bitsofnews - Submit, read, rank & discuss news - Rating
Bittercyclist - Bicycle accident map & community; map mash-up - Geo
Bittorrent - Share files & bandwidth - Office
Bitty - Embed content from web services - Publishing
Bitweaver - Content management system for communities and enterprise - Software
Bitwine - Get or give video advice for a price - Knowledge
Bitwise - Encrypted instant messaging - Communicating
Bix* - Create & vote for content, and win - Multimedia
Bixee - Job finder - Recruiting
Biznik - Business network - Community
Bizwiki - Uk social directory guide - Marketing
Bizzbites - Submit & rate business news - Rating
Blabb - Social bookmarking - Dead, Bookmark
Blabberize - Create & share talking pictures - Photo
Blablalist - Manage tasks - Office
Blabline - Search podcasts - Search
Blackarrow - Video ad management system - Marketing
Blackplanet - Community for African-Americans - Community
Blast - Promote your site for free - Marketing
Blastfeed - Only get the feeds that matter to you - RSS
Bleep - Music download store - Audio
Blendsforfriends - Order your own blend of tea - Ecommerce
Blerts - Graphics-based desktop RSS alert app - RSS
Bliin~ - Share your experience in photos, videos, text etc - Geo
Blinkbits - Share knowledge - Knowledge
Blinkcart - Put a shopping cart on any page & make some money - Marketing
Blinkist - Social bookmarking - Bookmarking
Blinklife*** - Social email - Communicating
Blinklistsocial - Lists of 2.0 websites - About
Blinkr - Digg design - Rating
Blinksale - Web-based invoicing - Finance
Blinkx - Search multimedia - Search
Blinkxsearchus - Personalized epg - Video
Blip - Get video & podcasting on your blog - Publishing
Blipfoto - Publish your phlog - Publishing
Blipstar - Create your own store locator - Geo
Blish - Buy or sell your media - Ecommerce
Bliss - Customize game to couple’s needs - Gaming
Blnk - Publish & share your profile and make new friends - Community
Blobber - Communicate with other site visitors - Communicating
Blockhunter - Find, sell or let a home & avoid real estate agents - Ecommerce
Blockrocker - Buy & sell thru classifieds; map mash-up - Ecommerce
Blocksavvy - Habbo for adults - Gaming
Blog - Publish your blog - Publishing
Blogabond - Publish your travel blog (map mash-up) - Publishing
Blogads - Make some money on accepting ads on your blog or website - Marketing
Blogbackuponline - Backup service - Storage
Blogbar - Searches your blog and the web - Search
Blogbeat (acquired by Feedburner) - Compare websites' Alexa rankings (formerly known as Alexaholic) - Dead, Stats
Blogbridge - Feed reader - RSS
Blogburner - Write a blog, and get a rev share - Economy
Blogburst - Syndicate blogs to mainstream media sites - Publishing
Blogbuy - Social market place - Dead, Ecommerce
Blogbuzzmachine - Blog search - Search
Blogcatalog - Blog directory - Search
Blogcheese - Publish video on your blog - Video
Blogcode - Start blog & find similar ones - Publishing
Blogdex - Folksonomied blog topics selection - Dead, News
Blogdigger - RSS feed directory - RSS
Blogelo - Rate & share websites - Bookmarking
Blogetery - Publish your blog - Publishing
Blogexpress - Feed reader - RSS
Blogflux - RSS ping tool - RSS
Blogger - Publish your blog - Publishing
Bloggerkit - Let Amazon exploit your blog - Ecommerce
Bloggersnap - Add your webcam snapshot to any blog - Publishing
Bloggerwave - Make money on writing reviews on your blog - Economy
Bloggingads - Make some money on accepting ads on your blog or website - Marketing
Bloggoggle - Categorize & rate pro bloggers - List
Blogher - Blogging community for women - Publishing
Bloginfluence - Let your art compete with other artists' submissions - Rating
Blogitive - Make money on writing articles on your blog - Economy
Blogladder - Create & maintain your blog - Publishing
Bloglebrity - Compute your blog's influence - Fun
Bloglet - Blog update notifications thru email - Publishing
Bloglines - RSS readers (web based, mobile) - RSS
Blogmailr - Use email to send blogposts - Publishing
Blogmarks - Social bookmarking - Bookmarking
Blogmemes - Vote for & share memes - Rating
Blogmusik - Explore music - Audio
Blogniscient - Rate your influence in the blogosphere - Rating
Blogoforum - Categorize your forum by tagging - Communicating
Blogprinting - Publish, print & sell it - Publishing
Blogpulse - Search blogs - Search
Blogr - Publish & share your media - Publishing
Blogreporter - Submit & rate blog articles - Rating
Blogrovr - Get links to context relevant blog articles while you're browsing - Search
Blogrox - Publish your blog (Wordpress) - Publishing
Blogrush - Sydicate your blog content, add widget to your blog & get more visitors - Marketing
Blogs - Notification2email - Publishing
Blogscope - Blog analytics software - Data
Blogsieve - RSS mixer - RSS
Blogsitter - Find (or offer yourself as) a blog co-publisher - Publishing
Blogsome - Publish your blog (Wordpress) - Publishing
Blogspirit - Blog solution - Publishing
Blogster - Free blog & image hosting - Publishing
Blogsticker - Put a sticker to your blog - Publishing
Blogstickr - Add fake stickers to your blog - Fun
Blogstreet - RSS feed directory - RSS
Blogsvertise - Make money on writing articles and reviews on your blog - Economy
Blogtalkradio - Host your own phone-in talkradio show online - Audio
Blogtelevision - Search videos in blogosphere - Video
Blogtoprofit - Make money on writing articles and reviews on your blog - Economy
Blogtronix - Blogging & corporate community software - Community
Blogtv - Live video cast tool - Communicating
Blogyx - Publish your blog - Publishing
Bloki - Publish your blog - Publishing
Bloodee - Digg horror - Rating
Blosker - Submit & rate strange & naughty news - Rating
Blotter - Graph your blog's popularity - Software
Bloxor - Maintain & use your blogroll online - Publishing
Blubbry - Publish, share or listen to pod & vodcasts - Multimedia
Bluebuzzard - Hospitality sales & marketing management solution - Productivity
Bluechipexpert - Profile yourself, invite friends & recruit other professionals, and get paid - Recruiting
Bluedot (formerly: Blue) - Find & share - Search
Blueform - Design your forms - Office
Bluegrind - Have your personal news anchor reading the news to you - News
Bluemountainarts - Submit your poems & get paid if they use it for greeting cards - Economy
Bluenotenetworks - VoiP solution for tele-workers, remote offices & suppliers - Communicating
Bluepuddle - Create & enrich maps - Dead, Geo
Bluepulse - Internet 2 cell phone - Communicating
Blueshoes - PHP app framework, plus CMS - Software
Bluesmiley - Manage your online life - Software
Bluetie - Collaborative Office-like toolkit - Productivity
Bluevex - Bet on sports & stocks - Dead, Gamble
Blufr - Multi-player trivia knowledge game - Dead, Game
Blummy - Manage your bookmarks - Bookmarking
Blurb - Turn your blog into a book - Publishing
Blursoftmetaforum - Forum solution - Software
Bmaccess - Social bookmarking with thumbs - Bookmarking
Boardreader - Forum & bulletin board search engine - Search
Boardtracker - Search forums - Search
Bofunk - Pick up content for your blog - Multimedia
Bok - Call long distance & international for a few cents (USA & Canada) - Communicating
Bolt - Watch, upload & share media - Storage
Bondd*~ - Call for free, get advertising - Communicating
Boo - Search , compare, share or buy trips - Ecommerce
Boober~ - Get or bid for giving loans - Finance
Boo-box - Add shopping links to your postings & make money on them - Marketing
Bookalesson - Matching service for instructors & students - Recruiting
Bookjetty - Catalog, tag, rate & review books, and check their availability in 300 libraries - Data
Bookmarkme - Help create & download bookmarks - Dead, Bookmark
Bookmarktracker - Social bookmarking - Bookmarking
Bookmooch - Exchange old books - Community
Bookr - Create & share photobook with Flickr images - Photo
Bookrevyoo - Social book review community - Community
Booksconnect - Community for readers, authors, publishers, librarians & booksellers - Community
Booksforschool - Buy & sell used text books - Ecommerce
Bookswellread - Publish & share book reviews - Publishing
Boomp3 - Upload & share your music - Audio
Boompa - Show your rides & find guides & parts to improve them - Economy
Boomtrek - Search for & contribute to mapped travel destinations - Search
Bordee - Instantly create message board for your page - Software
Boredwealth - Get paid to surf ("Alladvantage.com resurrected") - Economy
Bottomfeeder - RSS reader (cross platform) - RSS
Bouldr - Share climbing (map mash-up) - Community
Bouncefind** - Pleasantly designed search engine - with public API - Search
Bountee - Design, buy & sell T's - Ecommerce
Box - Store & share data - Storage
Boxbe - Use as your public address, let advertisers pay to reach you - Communicating
Boxcloud - Store & send - Storage
Boxed* - Build calendars out of all sorts of online sources - Office
Boxstr - Store & share - Storage
Boxxet - Personalize your incoming content - Startpage
Bozpage - Web 2.0 sources - About
Braincast - Voicemail2web - Communicating
Brainjams - Share knowledge & collaborate on ideas - Dead, Knowledge
Brainkeeper - Capture, distribute & collaborate on corporate knowledge - Knowledge
Brainreactions - Participate in brainstorms & share ideas - Knowledge
Brandgossip*~ - Find what people say about your brand - Search
Brands20 - Traditional brands in 2.0 design style - Fun
Bravenet - Publish your blog - Publishing
Break - Upload, explore, rate & share comedy videos - Video
Breakinglocals - Local artists and fans community - Dead, Audio
Breeze - Email marketing solution - Communicating
Brickfish* - Submit, vote for & review content, and get rewarded for it - Publishing
Brightcove - Upload, explore, rate, share & syndicate videos - Video
Brightroll - Monetize your video traffic with commercials - Marketing
Brilliantbuttonmaker - Button maker - Design
Bringalink - Submit better links on front page articles' content - Dead, Bookmark
Bringr - Submit & rate women's special interest articles - Rating
Bringsome - Ask the world to bring you some, or bring something to someone else - Community
Brinkpad - Create, edit & share your presentations - Office
Britepic* - Add extra content & intelligence to your online pics - Photo
Britney - Recommend, publish & digg next big hits - Rating
Briz - RSS reader (Windows) - RSS
Broadbandgenie - Find best provider - Ecommerce
Broadbandsports - Upload, explore, rate & share sports videos - Video
Broadclip - Crawl the web for your music, clip it & get it delivered to your player - Audio
Broadmining - Meta search - Dead, Search
Broadramp - Multimedia management solutions - Software
Broadsnatch - Share multimedia - Multimedia
Brokenotbeat - Donate to a needy person each day - Dead, Economy
Browse3D - 3D web browser - Browser
Browsershots - Test your site in different browsers - Software
Browster - Search & browse instantly - Search
Browzar - Surf anonymously - Browser
Brusheezy - Photoshop brushes for download - Design
Bryght - Create & maintain a community - Software
Bstir - Serve a random posting from your archive - Publishing
Btbot - Search bittorrents & ringtones - Search
Btopenzone - Search & connect to wi-fi hotspots - Wi-fi
Bttlxeforum - Bulletin board solution - Software
Bubble20snarkgroup - Everything against Web 2.0 - About
Bubbleguru - Record & publish your videos (featuring you) - Publishing
Bubbleply - Add bubbles to media & share them - Video
Bubbles - Launch frequently used sites in your system tray from a light browser (download) - Browser
Bubbleshare - Phlog, share, add audio captions - Multimedia
Bubblesnaps - Add balloons to your pics & share them - Publishing
Bubblr - Create & share photo strips - Publishing
Bubblus - Brainstorm together online - Knowledge
Buddymapping - Assemble your friends on a map & publish it - Geo
Buddymarks - Social bookmarking - Bookmarking
Buddymedia - PSP for Facebook's Ace Bucks - VAS
Buddyping - Find friends & events locally (map mash-up) - Office
Buddystumbler - Search for new buddies to chat with over IM - Communicating
Budgetpulse - Manage your budget - Finance
Budgettracker - Track your finances - Finance
Bugja - Bug tracking for ninjas - Software
Bugjuice - Track bugs - for groups - Software
Buglabs - Build your own hardware - open source consumer electronics platform - Personal manufacturing
Buildhardlink - Link to physical objects & access data over your cell phone - Geo
Builtsmarter - Modular site (re)construction software - Software
Bulletads - Make some money on accepting ads on your blog or website - Marketing
Bulletin* - Share data & mash them up with geo information - Dead, Geo
Bulletprooflinks - Share tutorials, tools & templates - Design
Bullpoo - Find, share & collaborate on investment information - Finance
Bunchball - Play games with your friends - Gaming
Burstcast - Upload & share photos - Photo
Businessitonline - Collaboration tools - Productivity
Business-planet - Submit & rate business news - Rating
Businesssoftware - Article on running a business on Web 2.0-based software - About
Bustaname* - Domain name checker - Search
Busythumbs - Post & share text & photos from cell to blog - Publishing
Busytonight - City guide wiki - Publishing
Butlerbob~ - Advertise, find, book & buy concierge services - Ecommerce
Butterfat - Traceroute map mash-up - Communicating
Butterfly~ - Bookmark & annotate - Bookmarking
Buttonator - Drag, drop & share web buttons - Design
Buttonbrowser - Button gallery and button maker - Design
Buttonmaker - Create buttons with a few clicks - Design
Buurtlink~ - Find people, places & news in your hood - Community
Buxfer - Keep track of shared costs - Finance
Buymyprofile - Buy or sell ad space on profile pages - Dead, Marketing
Buymytronics - Sell your used, new or broken electronics today - Ecommerce
Buyyourfriendadrink - Buy or redeem drinks thru cell phone code - Economy
Buzka - Social bookmarking - Bookmarking
Buzzchurch - Community & forum for music makers - Audio
Buzzdash - Create & share polls - Survey
Buzzfeed - Memetracker goes Boingboing - News
Buzzillions - Buy & review products - Ecommerce
Buzzingo - Buzz notifier (Yahoo + Feeling Lucky mash-up) - News
Buzzlogic - Monitor, map, measure & manage your rep in social media - Identity
Buzznet - Share videos & photos - Multimedia
Buzzshout* - Review & rank Web 2.0 companies - About
Buzzvote - Conduct polls - Survey
Buzzwire - Explore, create & share video & audio on your mobile - Multimedia
Buzzword - Work on documents together (acquired by Adobe) - Productivity
Buzzwordhell - Rate & condemn - Fun
Byoms - Personalized IM search agents on your cell - Search
Bytemycode - Submit & rate code snippets - Rating
Bzzagent - Create word of mouth by sampling among buzzervolunteers - Marketing
Bzzster - Recommend links to your friends - Bookmarking
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