4chan - 4chan is a simple image-based bulletin board where anyone can post comments and share images.
Reddit - Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.
Contextly - Contextly provides content recommendation system for publishers.
Slashdot - News for nerds, stuff that matters. Slashdot (aka /.
Digg - Digg delivers the most interesting and talked-about stories on the Web right now.
Aether - Aether is a free app that you use to read, write in, and create community moderated, distributed...