VirtueTech

"Ascend.Net" Windows Forms Controls
.NET Reflector Add-Ins
A Healthcare CRM Reference Application
A Professional Ribbon control
AJAX Control Toolkit
AppManager
AscendedThemeKit (Themed Windows Forms and Controls)
ASP.NET
Auto logoff on user inactivity in WPF application
AutoMapper
AvalonDock
Clog: Client Logging for .NET
Colorful Expression
CommonLibrary.NET
Composite C1 CMS - Open Source on .NET
CSS Friendly Control Adapters
DevForce Application Framework
ETSY v2 .NET API Library for Winform, WPF, Silverlight, ASP.Net, & ASP.NET MVC
Extended WPF Toolkit™ Community Edition
ExtJs Extender Controls