HipChat.Net is a C# wrapper for the HipChat API that simplifies the formatting of URLs. The API responds to calls in XML or JSON, but HipChat.Net also offers native POCO representations.
Caliber recently launched an app that allows users to instantly chat with LinkedIn business contacts. The app is driven through its integration with the LinkedIn API.
Two months ago TokBox gave up 2 million users to focus on its TokBox OpenTok API. The former video chat site instead wanted to make it easy for everyone to add video chat to their sites. The platform now has over 80 partners and is seeing great interest amongst developers. Today the company announced a move into making its video chat available on mobile devices.