imo.im keeps an absurd number of chats connected, so that you only have to log into one place to keep your msn/skype/facebook/gtalk/etc open.
IMO Messenger - Video Calls | Video Chat - Silvercrib
IMO messenger enables video calls right from your browser
Another Messenger App For iPhone: imo messenger
Imo Messenger - supports instant messaging across an impressive 11 networks MSN, Yahoo!, AIM/ICQ, Google Talk, Myspace, Skype, Facebook, Jabber, imo, VKontakte, and Hyves.
Origami set for IMO Messenger by Denis Sazhin
Stickers for IMO Messenger
Redesign : imo messenger by Ahmed Nayef