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.
Lainchan - Lainchan is a great imageboard package, actively building on it and adding a lot of features and...
Tildes - A non-profit community site driven by its users' interests
7chan - a simple image board alternative to 4chan small but still a nice community with much more rules...
SaidIt.net - Saidit.net - say your truth.