Yakalike - Chat while you surf websites

Yahoovideo - Submit, search & share videos

Yahoomyweb2 - Social bookmarking

Yahoomaps* - Global & local maps & search mash-ups

Yahoodevelopernetwork - Javascript developer centre

Yahooanswers - Share Q&A

Yadis - Foundation for URL-based identity management

Yackpack - Group voicemail

Xmailharddrive - Store data via Gmail

Xing** - Community for entrepreneurs & professionals

Xilinus - Social bookmarking

Xdrive - Store & share your data

Xanga - Blog community

Wondir - Share Q&A

Wobblog - Rank blogs

Wizlite - Fast dictionary

Wists - Share shopping lists

Wishlistr - Create & share wishlists

Wisdomdb - Rate & share solutions to problems

Wisdomark - Collaborate on publishing & sharing stories

Wisdm - Q&A

Xanco~ - Mobile phlog & vlog

Wwwhatsnew* - 2.0 blog

Wuraweb - Find local prices & credentials

Wufoo - Build & host forms (and databases)

Wsfinder - Search APIs and web services

Writely - Store, edit & share documents

World66 - Read & co-edit travel guide

Workmagnet - Search, find & apply for jobs, or recruit

Workcircle - Find recruiters or jobs

Wordofblog - Spread the word for good causes

Wordnews - News tagged in Times

Wordcast - Host, manage, measure & monetize podcasting

Wikicompany - Social business directory

Wifitastic - Turn your wi-fi connection into a profit center

Widgetbox - Directory for web widgets

Whowouldbuythat - Anti-ecommerce

Whonu - Discover/search content (more) intuitively

Wholinked - Pagerank tool

Who-isit - Whois, ping, check link popularity

Whisher - Share free wi-fi

Whirlpad - Publish & share travel journals

Where - Upload & share photos on community walls & maps

Whatsweb20 - Shortest list of Web 2.0 companies

Whatshouldireadnext - Share your bookshelf

Whatsbuzzing - Search, browse & discover products with a buzz

Wetpaint - Create & contribute to categorized wiki platform

Wereldkenner~ - Wikipedia & Google Earth mash-up

Weedshare - Play, buy, share & sell music

Webtwopointoh - Create your own 2.0 company

Webripper - Rip files from sites

Webride - Add forum to any web page

Webosphere - 2.0 blog

Weborb - Build, deploy & host rich client apps

Webnote - Make & share notes

Webmashup - Index of and discussions on mash-ups

Webmarketing20 - Wiki on marketing 2.0

Weblogistan~ - Tools that add interaction to your blog

Webjay - Playlist community

Webgoggles - Adult search

Web-feeds - Digg videos & links

Webfalls - Useless link sharing

Webcommons* - Consumers/Citizens unite!

Webby20 - Thumb 2.0 list

Webbrush - Collaborative drawing, charting, etc

Web2slides - Slow slideshow of (old version of) THIS list

Web2null - 2.0 blog (German)

Web2messenger - Send messages from web 2 messenger

Web2logo - Web 2.0 logos

Web2list - Digg 2.0 websites

Web2journal - Web 2.0 magazine

Web20validator - Screen your website on 2.0-ishness

Web20strategy - Does every organization need one?

Web20show - Podcasts about Web 2.0 companies

Web20quiz - Web 2.0 brand or Star Wars character quiz

Web20principles - Recap of updated 'official' O'Reilly definition of Web 2.0

Web20map - Web 2.0 companies on map mash-up

Web20intheenterprise - List of enterprise solutions

Web20inbelgium - Blog on Belgian Web 2.0 initiatives

Now: http://be.blognation.com/.

Web20generator - Generate a 2.0 web page

Web20foreducators - Web 2.0 list

Web20domainnamegenerator - Find cool 2.0 names

Web20definition - Summary of Web 2.0 definitions

Web20bullshitgenerator - Generate 2.0 speak

Web20alizr - Generate & promote a 2.0 app automatically

Wazima - Coupon aggregator

Waypath - Search blogs

Wayn - Log & share places & people

Wayfaring - Create & share your maps

Waxxi - Listen to & participate in podcasts

Waxmail - Add voice to your email

Watvindenwijover~ - Share your (expert) opinions

Watson - Add contextual search to all documents

Watchthisnext - Vote for & buy DVDs

Watchmouse~ - Site & server monitoring services

Watchmedoing - Upload & share mobile videos

Wasabi - Share news with friends

Wankr - Collaborative masturbation community

Wampad - Experiments in speed search

Wallop - Publish & share media

Vyew - Meet, share, discuss & annotate in group sessions

Vtiger - Open source CRM

Vsocial - Upload, rank & share video

Vox - Blog & share content

Voteo - Create, modify & participate in polls

Votemerich - Blog, campaign, vote & get rich

Voo2do - Organize your tasks

Voice20manifest - The end of telecom as we know it, the dawn of its total convergence with the web

Vmix - Upload & share videos

Vlogmap - Map your vlog

Vizu - Create, share & vote for polls

Vizrea - Upload & share (camera phone) photo content

Vivox - Solutions for communities, communications, games

Vivisimo - Clustered search

Vitamin - Resource for designers, developers & entrepreneurs

Vitalsource - Publish & sell or buy books

Visualthesaurus - Create, manage & share events

Visualcomplexity - Visualize complexity

Virtualworldsreview - Lists & reviews virtual worlds

Virtual-whiteboard - Work, think, design together

Virtualkarma - Web 2.0 list

Vimeo - Upload & share video

Vidilife - Upload & share media

Videosift - Upload, share & digg videos

Videoegg - Capture, edit & publish video

Viddler - Create, enhance & share your video

Veotag - Enrich media files with meta data & share

Veoh - Upload & share videos

Vennt - Tag-based forum solution

V-enable - Mobile speech search

Veetro - Create & share online project space

Vcarious - Travel community

Vast - Car search

V4s - Add voice to your email

Uspot - Upload & share media

Userscape - Web-based help desk portal

Userplanemoney - Rev share-based ad network for the sociosphere (AOL)

Userplane - Chat, messenger, record

Urlx - Shorten your URL

Urlfan - Real time blog reference search

Urlex - Leave comments on any website

Urbandictionary - Contribute to slang dictionary

Upwarded - Upload, rank & share multimedia

Upto11 - Discover & share music

Upcoming - Share local events with the world

Uncutvideo - AOL's You Tube

Unalog - Share what you read, in groups

Ulinkx - Search, bookmark & share media

Uhuroo - Collaboration tools

Typolis - Blogging solution

Typetester - Compare screen type

Txtmob - Share sms messages with your friends

TV - Filter out what's on tv

Tutor - Make money on tutoring people

Turnhere - Upload & share video (local)

Turn - Automate your online campaigns

Turbodbadmin - Online dbase in Ajax

Turboclip - Publish, access, manage & share bookmarks

Tunecore - Create & sell music

Tudu - List & manage your tasks

Truveo - Ranked video search

Trumba - Create & share events

Trueshare - Store, manage & share files

True - Dating, free of married people and other criminals

Trivionomy - Create, edit & play trivia game

Triporama - Plan, research & book trips together

Tracbac - Share, comment, revise & collaborate on design

Towncrossing - Create & participate in communities

Tourfilter - Get email alert when your favourite band is in town

Tripmojo - Map & share hotels

Tripconnect - Publish & share travel advice

Tribler~ - Watch, rate & share video

Trendio - Bet on popular news (prediction market)

Trendalicious - Web stats

Treinvizier~ - Actual whereabouts of Dutch trains

Treemaptechniques - Comprehensive article

Travbuddy - Submit & share travel stories

Tradindex - Spread betting exchange

Tradesports - Betting exchange

Tradebetx - Betting exchange

Trackslife - Manage & share your to do-lists

Toread - Social bookmarking

Toptensources - Top 10 gossip news

Topix - Share & discuss news

Top25Finance20 - List of FINANCE 2.0 apps & services

Top10webdeveloperlibraries - Annotated top 10 of developer libraries

Toodledo - Manage your to-dos

Togetherdating - Dating after personal introduction

Toeat - Map & share restaurants

Tnook - Build, manage & trade your collections

Titlez - Get publishing market data from Amazon

Titantv - Filter out what's on tv

Tioti - Discover, download & discuss tv content

Tinytinyrss - Feed reader

Tinymce - Wysiwyg editor

Tinfinger - Search persons

Timetracker - Keep track of time

Tiltomo - Search for similar photos

Tilika - Share calendars

Tiktrac - Manage your time

Tiddlywiki* - Publish and share notes

Tictap - Price comparison for mobile

Tickr - Flickr desktop ticker

Tick - Time tracking app for teams

Thumbstacks - Make & share presentations online

Thumblicious - Displays thumbs of most pupular Delicious sites

Thnlnk - Semantic URL shortener

Thisplaceiknow - Share places

Thinglink - Search, label & share things of interest

Theunseenvideo - Video & weather mash-up animation

Theuncensored - Upload, share & rate porn

Thethingsiwant - Create & share wish lists with photos

Theport - Create & host your own news aggregator

Thepool - P2P sports betting

Theparalysiscommunity - Spinal cord injury community

Themintpages - Recommend & share reviews on beauty products

Theglump - 2.0 blog

French.

Thebroth - Collaborate on & share global mosaic

Theblackstripe - Upload & share photos

Theadcloud* - Create & tag classified listings

Thandora - Tag based search in yellow pages

TFD - Personal portal

Textsnippets - Share code

Textpayme - Pay with your phone

Textpattern - Web publishing system

Textorizer - Image2Text

Textdrive - Hosted applications

Textamerica - Mobile blog

Terk~ - Meta search for articles

Tendango - Top 10 list community

Tenbills - Design & buy your T

Tempinbox - Receive inmail anonymously

Techzingo - Tagged tech news

Technorati* - Find what bloggers are saying

Technoranki - Share your mistakes & have them rated

Techcrunch - Comparison of mapping services

Techcrunch* - 2.0 blog

Teamwork - Organize & manage projects

Teamslide - Collaborate on presentations

Tastydrop - Submit & rate wines

Tasktoy - Create lists, notes & memos

Taskspro - Group task manager

Taskfreak - Task manager online

Targetyournews - Control who sees your news submission

Tapgad - Get & reply to email through sms

Tantricsoulmateconnection - Matching based on horoscopes etc.

Talkr - Convert blog text to podcasts

Talkdigger - Search & discuss results from blogs & web

Tailrank - Read news (ranking through algorithm)

Tagzania - Share & map places

Tagtooga - Social bookmarking

Tagthenet - Text2Tags

Tagmos~ - Social bookmarking

Taglocity - Add tags to all Outlook files

Taglines - News in tags

Taghop - Digg links

Tagground - Search for URLs by tag or v.v.

Taggle - Social bookmarking, tagged

German.

Tagged - Tag yourself and the ones you love

Tagfacts - Tag & share your notes

Tagdirectory - Tagged business directory

Tagcloud - Folksonomied, personalized tag clouds

Tagalag - Tag & map your contacts

Sys-con - Multimedia magazine

Syncone - Social bookmarking

Syncnotes - Create & share notes

Synchroedit - Group editor

Sync2it - Social bookmarking

Sync~ - Customize your info on special interests

Synapselife - Customizable services portal

Sxore - Manage your online reputation

Sxip - Control personal digital identity

Sxdguide - Whitepaper on social media, practices & content

Swik - Search for open source software

Swicki - Search with user input

Swarmofangels - Participate in new cinema financing

Swaptree - Swap your media

Swagroll - List & share all your media

Swabba - Online garage sale

German.

Sutori - Publish & vote on stories

Surfwax - Multisource search

Surftail - Share your click paths

Surfninja - Ajax start page

Suprglu - Meta mash-up startpage

Suprcilious - Tag all other tag sites

Superstart - Personalized shopping portal

Swedish.

Superoyster - Sell or buy your place at a waiting list

/ Suprglu - Delicious/Flickr/Blogger/etc. mash-up - Startpage

Sundera - Collaborate online on spreadsheets

Sundaydash - Find housing

Sugarstats - Manage your glucose readings

Sugarcrm* - Open source CRM

Suckingfish - Save, collaborate on & publish search results

Subethaedit - Edit & share texts together

Stylehive - Get recommendations fitting your product interests

Stuffpals - Search, buy & sell

Olim: Whabam.

Stuffopolis - Keep track of things you lend or borrow

Structuredblogging - Create, edit & maintain all posts

Strongspace - Upload, store, back-up & share your files

Strmz - Clip & share tv & video

Stripgenerator - Create & share comics

Streeteasy - Share shopping info

Strategicboard - Share tech news

Storycode - Read, code, find & share books

Stocktickr - Create & share stock watchlists

Stockdigg - Read, submit & rank financial news

Stikipad - Wiki solution

Stickis - Publish & share notes on websites

Stickam* - Multimedia communication community

Web20trafficwatch - Rankings of 937 Web 2.0 companies

Olim: Alexaholic. Crossing between earliest published version of my index and Alexa.

Statsaholic - Compare and measure website statistics

Statcounter - Web stats

Startforce - Start page with OS features

Japanese.

Starterbase - Create, organize & share data on the web

Startaid - Manage & share your (thumb) bookmarks

Stargazer - Free web-based tools for families & charities

Stardoll* - Dress up & share your favourite celebrities

Staralicious - Digg (news about) celebrities

Standpoint - Share & evangelize convictions

Stalkerati - Meta search for people

Stabilo-boss - Web 2.0 annotated logo cloud

Squidoo - Share knowledge

Squadrapiloti - Tell about & share your car

Spymedia - Publish & sell news photos

Spurl - Bookmarking & search

Sproutliner - Manage your tasks

Sproutit - Mailroom: process email together

Sproose - Personalize search results & share them

Springdoo - Add your voice to your email

Spring - Java/JEE application framework

Spreadshirt* - Design, buy or sell your T's

Spreadfair - Spread betting exchange

Spout - Publish & share reviews, buy films

Spotrunner - Recycle, recreate & air tv ads

Spotback - Customize your news through your clicking behaviour

Sportsmates - Sports bloggers community

Sportiki - Wiki on sports

Spore*** - User generated gameplay & characters

Sponit - Publish & share funny news

Spongecell - Arrange meetings & events online; with AI

Splashdata - Mobile tools for media, payments, shopping…

Splashblog - Publish & share mobile photos

Sphere - Search the blogosphere

Spellwithflickr - Spell names with photos; Flickr mash-up

Sparkhive - Store & share thoughts, research, bookmarks

Spambob - Disposable email addresses

Soundtransit~ - Add your sounds to locations & share them

Soundblog - Reviews & lists of sound apps (& other cool stuff)

Souki*~ - Get better search result through your taste mates

Sorrygottago - Anti-communication software

Soonr - Mobile2web & v.v.

Sonr - Track audio media & media users

Solve360 - Groupware CRM

Solomodels - Upload, communicate with, vote for, hire or buy from photographers & models

Socialtext - Enterprise wiki solutions

Socialporn - Digg links to porn

Socialpicks - Analyse & recommend stocks with your peers

Social-mail - Email2RSS

Socializer - Submit social bookmarks at many websites

Socialight - Share pictures & notes with your cell phone

Socialexplorer - Find out about your neighbours

Soapbx - Present online

Snunk - Search & vote

Snubster - Get rid of your friends

Snipit - Clip parts of web pages

Snaptune - Record music from radio to hard disk

Snapshirts - Get your T-shirt with a tag cloud

Snapfish - Upload & share photos

Snapbits - Store, sort & retrieve bits of information

Snap** - Adds pics of pages to your links

Snaket - Clustered search

Smugmug - Store & share photos

Smilebox - Pimp up your photo presentation

Smblive - Share all business applications

Smashmyviper - Buy pixels to destroy car

Smartimagine - Store & manage your image & media files

Smarking - Social bookmarking

Smarkets - Stock markets for products

Slut-o-meter - Calculate your popularity

Slurlmaker* - Bookmark sites in Second Life

Slidestory - Publish stories with photo slideshows

Slide* - Create photo loops & share them on your website

Slawesome - Add voice to your email

Slashdigg - Slashdot + Digg mash-up

Skype - Call, conference, messenger, file sharing

Skylook - Record & store all Skype communications

Skyhook - Wi-fi positioning

Sky-click - VoIP callcenter solution

Skoeps~ - Citizen journalism based news

Skobee - Arrange meetings & events online

Skibonk - Mapped ski resorts

Sketchup - Create & view things in 3D

Sitevista - Test your website

Sitetagger - Social bookmarking

Siteshuffle - Make a slideshow from your favourite websites

Sitejot - Social bookmarking

Siteflavoredgoogle* - Tailor adwords to your site

Siteblimp - Promote your online identity thru search

Sitebar - Social bookmarking

Singlesearch - Two way matchmaking

Simpy - Social bookmarking, tagging & search

Simplyhired - Local job search

Simplygoogle - Everything Google on 1 page

Simpleticket - Helpdesk solution

Simpleseating - Seating tool

Similicious - Search for similar websites

Simile - Semantic interoperability of metadata and information tools

Sightspeed - Voice & video over IP

Sidewalk - Create Ajax forms

Sideload - Share free music files

Sidejobtrack - Job tracker

Shutterseek - Digg photography news

Shutterfly - Store, share & print photos

Shutterbook - Store & share photos

Shoutwire - Digg news

Shoutcentral - Publish yourself & chat while you surf

Shorttext - Create & share URL's to text notes

Shopwiki - Search 120,000 stores

Shoposphere* - Create & share pick lists

Shooshshare - Search & save porn

Shinyletter - Mail2snailmail

Shazam - Have music recognized thru your cell

Sharpcast - Synchronize all photos online & mobile

Sharkle - Watch, vote for & share videos

Sharingpoint - Publish, link to & share health information

Shareyouropml - Share outlines, feed & taxonomy

Sharecare~ - Organize yourselves in groups to share care

Sharea - Manage what you share with whom

Shamblesweb2 - Categorized 2.0 list

Shakkus - Bookmark, rank & share entertainment news

Shadows - Social bookmarking

Sfzero - Build your character by completing group tasks

Sexbyrss - Personalized porn thru rss

Sevenload*** - Upload & share photos & videos

Serversidewiki - Mini-wiki

Sendthisfile - Store & send

Sendspace - Email large files

Semanticthoughts - Get all 2.0 lists in OPML

Selsius - Real estate community

Selfcast - Upload, watch & share vids

Selectrecruiters - Find the right recruiter

Seekum - User ranked search results

Seedwiki - Create wikis & blogs

Secondsite - Web-based invoicing

Seconds11 - Promote (11 seconds) of your podcasts

Secondlifeboutique - Buy real things with virtual money

Searchinsidethemusic - Search music by content and context

Searchinnovations - Categorisation of search technologies & presentations

Also see Altsearchengine.com.

Searchfox - Social bookmarking

Scrybe - Share calendar, lists etc

Scroogle - Google without ads & other evil

Scriptaculous - Javascript libraries

Scribefire - Blog analytics

Olim: Performancing.

Scratchnscribble - Mail handwritten postcards

Scratchlist - Social bookmarking, partly automated

Scoopt - Upload & sell news photos

Scooch - Create & share slide shows

Schtuff - Wiki service

Schoopy - Classroom organizer & site hosting

Schooltool - School calendar & info system

Schoolbank~ - Profile yourself & find back class mates

Say-so - Share problems & get advise

Sayoutloud - Post questions & issues, get answers or reactions

Savetoby - Donate or else...

Savemyporn - Adult search

Savemyass - Send your wife flowers frequently

Savedsearchpro - Find Ebay deals easier

Sampa - Build a website

Sameplace - Chat while you surf

Salesgenius - Track your prospect's behaviour online

Safariu - Create, publish & share science materials

Sabrosus - Store & share bookmarks

Sabifoo - Read & publish news through messenger

Runfatboy - Manage your diet & fitness

Rubyonrails* - Web development framework

Rubricks - Content management system for Ruby on Rails

Rtmaker - Make, upload & share ringtones

Rssreader - Feed reader

Rssmicro - Feed search

Rssmad - Feed reader & archive

Label: RSS 2.0 - found dead on 070812.

Rsshut - Read & search feeds

Rssfwd - RSS to email

Rsscalendar - Manage & share your calendar

Rss2pdf - Convert feeds to PDF

Rrove* - Save & share places

Roxomatic - Social bookmarking review

Routecraft~ - Route planner; add your text to locations & share it; also for mobile

Roundcube - Webmail

Rootvaults* - Store, manage & share knowledge online

Root* - Trading platform for realtime consumer data

Rollyo* - Create search agents

Rockyou - Publish & share photos & slideshows

Riya* - Face recognition based photo search

Riffs - Recommend, chat & share

Revver - Upload, share or sell your videos

Retrievr* - Search images by sketching

Respons~ - Submit & rate Dutch news

Reputator~ - Manage your reputation online

Rentxista - Rent a page

Rentmeavacation - Share your vacation homes

Remix - Remix & share videos