Shtuff Chat - Free Group / Team chat with persistent history.
JabbR - A chat application built with ASP.NET and SignalR.
Chattp - Chattp is the software that simply converts your page into chat by augmenting the browser Windows.
Smarsh Instant Messenger - smarshIM Mobile is a free application download that requires a paid account on the smarshIM service...
MyENIGMA - MyENIGMA is an app that allows you to send text messages, videos, audio clips, photos, and files to your friends and family securely.
Anologue - Disposable online chat.