Peoplejam - Get a better career, relationships, health, life by networking

Viewbook - Create & share presentations, photo albums & portfolios

Zinadoo - Design, build & host mobile website

Blogster - Free blog & image hosting

Classiccat - Free classical mp3 directory

Switchpod - Host & promote podcasts

Yahoopublisher - Display ads & make some money

Movamessenger - Meta mobile instant messenger

Fluther - Q&A

Cakephp - Rapid development framework for PHP

Wizzrss - Read feeds

Yideoz - Oy vee, video sharing for jews

Movedigital - Store & send

Virtualinstrumentmuseum - Search musical instruments

Zaptxt - Rss2email + mobile rss reader

Opinionaggregator - Q&A

Squarespace - Publish your blog

Qcodo - Open source PHP framework

Rateyourmusic - Music recommendation community

Taskee - Manage your tasks

Licq - Instant messenger

ICQ-like, Linux.

Traktor - Create & share your own electronic instruments

Xepient - Content management system

Slideaware - Compile & share presentations

Sourceforge** - Hosts more than 100,000 open source projects

Okaytoplay - Tools & resources for podcasters & vloggers

Highvibeit - Submit & rate positive news

Metatube - Search +100 video sharing sites

Musicsack - Repository of data about people involved in music

Askalibrarian - Q&A

A by Library of Congress.

Zoomshare - Publish your blog

Wikicharts - Most viewed Wikipedia articles

Pebblepad - Manage your documents

Spark - Instant messaging & free phone calls

Stagefm - Indie music & video sharing

Slidelive - Compile & share presentations

Lyricwiki - Collaborate on lyrics database

Mobile social networking: still an innovators' thing

More interesting figures from M:Metrics are here.

Titvertising - People 2.0

UGC goes marketing?
Web 2.0 is not about technology, it's about People.

Readme - Exchange info & compare notes on books

Thatschillin - Submit & rate trivial news & videos

Gamediggity - Submit & rate game videos

Olim Gamelemons.

Mydatabus - Store & share

Rsspanelx - Script to display all feed formats from originating website

Blogetery - Publish your blog

Wordpress.

Askmehelpdesk - Provides answers & get tipped

Causerie - Mobile instant messenger

Demofuse - Create & publish website tours

Slideburner - Compile & share presentations

Globalideasbank - Submit & share ideas to improve society

Leetdaily - Submit & rate articles on gaming

Megaupload - Store & share

Syndic8 - RSS feed directory

Answerlytics - Q&A

Blogsome - Publish your blog

Wordpress.

Blueshoes - PHP app framework, plus CMS

Ayttm - Instant messenger

IT - Anytime, anywhere

Designaddict - Explore & contribute to design directory

Flurl - Submit & rate videos

Shoutpost - Publish your blog

Writer - Process & share word documents

Qumana - Make some money on accepting keyword-based ads on your blog

Annoyances - Q&A on Windows

Zoomandgo - Upload & travel photos & videos

Scriptlance - Pitch for a coding job

Bitlbee - IRC clients using IM protocols

Idea-a-day - Submit an idea, get comments & a publication

Freelanceportfolios - Submit your portfolio & get assignments

Hrsalad - Submit & rate articles on hrm

I2drive - Store & share

Allexperts - Q&A

Tooum - Publish blogs & forums

Sologig - Pitch for a gig

Text-link-ads - Make some money on accepting ads on your blog

Bitwise - Encrypted instant messaging

Esy - Content management system

BT's new Timeline Of The Future

BT's better than ever vision on things to come (amongst which more people who believe in SF).

If you don't like the animation, get the static version here.

Mscape - Connect media & experiences to real locations

Bigstockphoto - Upload your images, have them reviewed & sell them

Gamesnips - Submit & rate articles on gaming

Spigit - Show, simulate & share your solutions with other developers

Codefetch - Searches source code from books

Rssmesh - RSS mixer

Dizzay - Questions & instant answers through chat

Bravenet - Publish your blog

Rentacoder - Pitch for a coding job

Xmgimage - Photo editor

Thankyoupages - Make some money on accepting ads on your blog

Aimexpress - Instant messenger

Web based.

Sheetster - Create & share spreadsheets

Media-convert - Convert videos to other formats

Sliderocket - Compile & share presentations

Mediamaster - Backup service

Livevideo - Upload, explore, rate & share videos

Stockxpert - Submit & sell your photos

Liszen - Search blog articles for librarians

Flypicture - Store & share

Education - Q&A

Blogrox - Publish your blog.

Wordpress.

Appfuse - Open-source framework for Java web apps

Agile - Mobile meta instant messenger

Thinkaction - Make some money on accepting ads on your blog

Reqall - Make & share notes

Whatalist* - Explore, publish & share lists

Creataplace - Design, build & host a simple website

Designquote - Job search for designers & programmers

Feedexpress - RSS reader

Windows.

Freefilehosting - Store & share

Kopete - Meta instant messenger

Lipstick - Submit & rate celebrity news

Mediabum - Upload, explore, rate & share funny videos

Nownow - Ask a question, get three answers by email

Rememberthemilk - Manage tasks

Shutterstock - Submit & sell your photos

Thepodcastnetwork - Explore podcast channels

Wordpress** - Publish your blog

Yesadvertising - Make some money on accepting ads on your blog

Photostockplus - Submit & sell your photos

Edtags - Submit & rate articles on education

Feederreader - RSS reader

Mobile.

Applewebobjects - Rapid application development environment

Cramster - Q&A

Etribes - Publish your blog

Whodoes - Organize & manage projects

Guru - Marketplace for freelancers

Valueclick - Make some money on accepting ads on your blog

Protonotes - Make & share notes on your prototypes

Onlinewritingjobs - Gig directory for freelance writers

Amsn - Instant messenger

Linux.

Podtrac - Host & publish podcasts, and share ad revenu

Ibackup - Backup service

Mixbook - Create & publish books together with friends

Eyespot - Create, edit, upload & share videos

Filepanda - Store & share

Apidashboard* - Repository of APIs

Feedeye - Read feeds

Fatpitchfinancials - Submit & rate financial news

Blog - Publish your blog

Tracks - Personal organizer

Regonline - Organize & manage events

Vibrantmedia - Make some money on accepting contextual ads on your blog

Answeru - Q&A on education

Imagecatalog - Submit & sell your photos

Recycledpapergreetings - Submit your poems & images, and get paid

Easymessenger - Meta instant messenger with RSS

Rapspacetv - Rap & hiphop community

Fellowforce~* - Help companies to innovate; pitch & get rewards

Dltv - Video podcasts for tech geeks

Carbonite - Backup service

Allthecode - Search code

Feeddemon - RSS reader

Windows.

Digg-gay - Submit & rate special interest articles for gays

Qads - Make some money on accepting ads on your blog

Able2know - Q&A

Expressdigital - Create a shop & sell your photos

Project4hire - Pitch for a freelance job

Bluemountainarts - Submit your poems & get paid if they use it

Freelanceauction - Pitch for a design job

Adium - Instant messenger

Client, Mac.

Podlinez - Explore podcasts on your cell

Seven - Email etc delivered to your mobile

Elxis - Content management system

Wiredness - Edit your photos

Rbuilder - Explore, customize or build & sell web apps

Adknowledge - Make some money on accepting ads on your blog

Docstoc - Manage your documents

Instacalc - Online calculator

Todoz - Organize & manage groups

Zohomeeting - Organize & manage web conferences

Yottamusic - Search music

Helpfulvideo - Share your knowledge via video

Boxstr - Store & share

Eurogoalnews - Submit & rate & tag soccer news

Slapvid* - Watch the Youtube Top25 in 5 minutes

Yacs - Content management system for blogging communities

Adbrite - Make some money on accepting contextual ads on your blog

Soundflavor - Music community

Zohoprojects - Organize & manage projects

Shrook - RSS reader

OS X.

Rotaboard - Schedule meetings & events

Xsto - Upload, store & manage your photos

Postful - Webmail2snailmail

Keegy* - Location aware news generator

Itunes - Music downloads

Yahoopodcasts - Explore, create & share podcasts

Monster - Job board

Yahoomobile - Search, email & news

Mp3 - Community of artists & fans

Ajaxos - Operating system

Yahoopatterns - Repository of solutions for developers' problems

Rojo - RSS reader

Web based.

Thunderbird - Mozilla webmail solution

Windows.

Googleimages - Search images

Yahoovideosearch - Search video

Googlevideo - Search video

Hotmail - Webmail solution

Now: Windows Live Hotmail.

Gmail - Webmail solution

Cartfly** - Create & exploit a store & embed it anywhere

Mtraks - Buy or sell indie music

Dragonflycms - Content management system

Sparc - Customizable startpage

Preloadr - Edit your photos

Yahoohotjobs - Job board

Propelr - Manage tasks

Simplifythis - Manage your invoicing

1time - Organize & manage projects

R-mail - Rss2email

Arunalabs - Store & send

Bytemycode - Submit & rate code snippets

Mogulus* - Video cast tool

Tamadaa - Webmail solution