ActiveXperts Twitter Toolkit
Twitter component for Windows developers to write and read tweets
ActiveEmail
SMTP and POP3 Windows Component for VB .NET, CSharp .NET, C++ and more
ActiveSocket
Network component for Windows, VB.NET, VC#.NET, Delphi, ASP .NET, C++ and more.
WiFi-Manager
Manage wireless connections in Windows XP/Vista!