Hacker News is a social news website focusing on computer science and entrepreneurship. It is run by Paul Graham's investment fund and startup incubator, Y Combinator.
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.
News for nerds, stuff that matters. Slashdot (aka /.
4chan is a simple image-based bulletin board where anyone can post comments and share images.
Hubski is a community for sharing thoughtful information and conversation.
A web-based forum where users submit links, pictures, posts, etc.
Snapzu is basically reddit alternative.
Empeopled is a content-sharing community that
Telescope is an open-source app that lets you easily set up your own online community.
TopTopic is an uplifting space to create, discover, discuss and earn from compelling content.
9GAG is the app for you to LOL, kill time and make new friends all around the world.
Linkibl is where you can discover and share the Internet's most interesting content every day.