Walkaround - Walkaround is a variant of Wave, based on the Apache Wave code base, that runs on App Engine.

Chattp - Chattp is the software that simply converts your page into chat by augmenting the browser Windows.

Unsee - The ability to open a chat session and message then delete it from history forever just like tlk.

JabbR - A chat application built with ASP.NET and SignalR.

Rizzoma - Email and IM are linear contextless communication tools.

MyENIGMA - MyENIGMA is an app that allows you to send text messages, videos, audio clips, photos, and files to your friends and family securely.