This is version 8.0 of the Microsoft® Health Common User Interface Control Toolkit. The scope and requirements of this release are based on materials produced from extensive consultation with patient safety experts, clinicians, user interface designers and application developers. This release includes new controls, and code updates to controls, in Microsoft® Silverlight™ 3 and Windows® Presentation Foundation (WPF), as listed below.
http://commonlibrarynet.codeplex.com/
A collection of very reusable code and components in C# 3.5 ranging from ActiveRecord, Csv, Command Line Parsing, Configuration, Validation, Logging, Collections, Authentication, and much more.
This is ideal for C# developer looking for a Utility library, Java developers looking for a C# version of Java Commons.
http://telerikaspnetmvc.codeplex.com/
Very nice Grid & Menu control for MVC stuff