There are around four textboard sites that people use None as popular as 2ch is. They are not well known which means the posters are usually make good posts. even the dis.4chan.org/lounge/ and others aren't used by the imageboard users- even though they are on the same site
4chan.org is the only English-speaking imageboard anymore. Their /int/ board is pretty nice.
>>84-san is wrong there are many imageboards but 4chan is the only very popular one in the west The rest are slower but they are still used. some examples: 7chan , 420chan ( drug users), iichan, desuchan