XIU

.NET Extensions Methods Library for C# and VB.NET (ASP.NET, MVC, SL, WPF, EF)
.NET Image Tools
AlphaFS - Bringing Advanced Windows Filesystem Support to .NET
ARSoft.Tools.Net - C# DNS client/server, SPF and SenderID Library
CodePlex Publishing Plugin
CodePlex.SpaceBlock
CommonLibrary.NET
Deep Zoom for WPF
EasyHook - The reinvention of Windows API Hooking
Elysium
Entity Framework Runtime Model Adapter
Expressions.Compiler
Facebook Developer Toolkit
Fidely - Search Query Compilation Framework
Html Agility Pack
ILCalc: Arithmetical Expressions Evaluator
Irony - .NET Language Implementation Kit.
Javascript .NET
jGestures: a jQuery plugin for gesture events
jHtmlArea - WYSIWYG HTML Editor for jQuery