The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
Empathy - Apps/Empathy - GNOME Wiki!
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.
Gajim - Full featured and easy to use Jabber client
Ask Me Help Desk - Ask Me Help Desk is a question-and-answer site.
IM+ - Chat everywhere! IM+ is the most widely used mobile IM app! Connect all-in-one to MSN, Yahoo!, Goo...