8chan

8chan (also called Infinitechan and stylized as ∞chan) is an imageboard website composed of user-created boards. It's notable for its stance on free speech, allowing any content as long as it doesn't violate US law.

Role in GamerGate
The site has served as a hub for GamerGate related discussion on it's /gamergate/ board. Fredrick Brennan (nicknamed "Hotwheels" by residents of 8chan) — the owner of the site — is also an outspoken GamerGate supporter who has defended the consumer revolt on places such as HuffPostLive, The David Pakman Show and a debate organized by Al Jazeera America Tonight.

Board Culture
See also: Chan Culture and Anonymous

Infographic about 8chan.