Shtuff Chat - Free Group / Team chat with persistent history.
Meet in Chat - Meet new people. Have fun sharing photos.
JabbR - A chat application built with ASP.NET and SignalR.
Kandan - Open Source private chat server. Your own private Chat server in minutes, plus additional features.
Smarsh Instant Messenger - smarshIM Mobile is a free application download that requires a paid account on the smarshIM service...
The New Dropbox - Enterprise software portal for team collaboration