Site directory

The UK and Ireland's teen network, sold for a pittance

Social news, and the redesign that broke it

The social network at 500 million users

Ask me anything, anonymously

Check in, become the mayor

The original social network, thriving in Southeast Asia

Big in Latin America and Portugal

Square photos, filters, iPhone only

The professional network before it became a feed

Communities, moods and friends-only posts

The fading giant with glitter graphics and a Top 8

Google's social network that Brazil and India loved

China's biggest social network, built on QQ

The front page of the internet, before it was

China's microblog, one year old

Reblogs, GIFs and the dark blue dashboard

140 characters and the Fail Whale

Russia's Facebook, with a music library

Free TV on the web, with ads, US only

File lockers, 72-minute limits and pirated TV

Red envelopes, and a streaming-only plan

Where filmmakers uploaded in HD

Two billion views a day, 360p by default

Name your price

Any song, on demand, free, and legally doomed

The MP3 blog aggregator

Ten billion songs sold, and the Beatles arrive

Scrobble everything you play

The P2P client a court shut down in October 2010

Type a band, get a radio station

Skype's founders try music streaming in America

Waveforms and timed comments

The European streaming service Americans could not get

The former Ask Jeeves gives up on search

China's search engine, after Google walked away

Microsoft's one-year-old "decision engine"

Ten blue links, and results that appeared as you typed

A computational knowledge engine

Nickelodeon's Flash arcade

Sponsor of the best Flash games

Disney's virtual world for kids

Pixel rooms and furni

Flash games with achievements, bought by GameStop

Free games, and the school-computer favourite

Everything, by everyone: the Flash portal

The browser MMO played in the school library

Anonymous, /b/, and the meme factory

Random strangers, webcam to webcam

Sketch comedy before YouTube channels

6 Reasons the Listicle Ruled 2010

The largest online art community

Flash videos, viral clips and content wars

LOLcats as a media company

The internet's meme encyclopedia

Talk to strangers

The forums that cost ten bucks

Anonymous drunk texts, sorted by area code

A magic folder that synced, 2 GB free

Social coding

Word processing in the browser, shared with a link

Programming answers, upvoted

Buddy lists and away messages, fading fast

Books, Kindle, and a store that sold everything

Dial-up subscribers, AIM, and a content empire in the making

Blogspot blogs with orange Bs

Plain blue links that killed newspaper classifieds

Social bookmarking, sunset by Yahoo

Auctions giving way to Buy It Now

Five billion photos, and the iPhone as top camera

The blog that bought a lost iPhone prototype

Conversations, labels, and 7 GB of storage

Every blog you followed, in one inbox

Chat inside your inbox

One deal a day, and a $6 billion offer refused

Your personalised homepage of gadgets

The movie database, 20 years old

Where MySpace and forum images lived

Questions answered by people who were there

Wait 60 seconds, then download

Free calls over the internet, video included

Press the button, see a random great page

Start-up news, bought by AOL

The blog that became a newspaper

The torrent tracker that would not die

Collateral Murder, the war logs and Cablegate

Three and a half million articles and a new default skin

The world's biggest webmail, redesigned

Nudges, winks and display names full of lyrics

Hosted WordPress, and the software running the blogosphere

The portal: mail, news, Answers and Flickr

Reviews of everything, and fights with restaurants