LibraryThing

Book reviews and recommendations. Track what you read, find new books.

National Novel Writing Month. Write 50,000 words in November with community support.

Blogging challenge: publish 100 posts in a year. Encouraging people to write more.

Non-profit link aggregator focused on quality discussion. No ads, open source, privacy-respecting.

Photography community and marketplace. Discover and license stunning photography.

Photo sharing community since 2004. Billions of photos organized by groups and tags.