Создал канал #dou на freenode.net.

Клиенты:

IRC клиенты для MacOS
http://www.codeux.com/textual/ - Использую, мне нравится
http://limechat.net/mac/
http://quassel-irc.org/downloads

Linux
http://xchat.org/

IRC клиенты для Windows
http://www.mirc.com/
http://www.silverex.org/download/
http://quassel-irc.org/downloads

Chrome
https://chrome.google.com/webstore/detail/chrocha-irc-client-for-ch/eoajgjnmcikichkdpkjkpgoejkglinbd
https://chrome.google.com/webstore/detail/mibbit-webchat/hbadbkkklnhamjjeagmknajgmbgcmnpi?hl=en-GB

Firefox
https://addons.mozilla.org/en-US/firefox/addon/chatzilla/
https://addons.mozilla.org/en-US/firefox/addon/freenode-irc-client/?src=search

Android
https://play.google.com/store/apps/details?id=com.androirc&hl=ru

iOS
https://itunes.apple.com/us/app/mango-lite-free-irc-chat-client/id449136259?mt=8
https://itunes.apple.com/ru/app/dump-chat-irc-client/id647483432?mt=8