Witty is a open source twitter client for Windows powered by the WPF.

Here are some key features of "Witty":

· View recent Twitter statuses from the people you follow (auto-refreshing)
· View recent replies to you
· View a specific user's timeline
· Update your twitter status
· View and respond to Direct Messages
· Links will open in the user's default browser

Requirements:

· .NET Framework 2.0