BlogEngine.NET is a full featured blog engine targeted at .NET developers. It is light weight and very simple to modify and extend.

A complete operating system written in C#.

The Dynamic Language Runtime enables language developers to create dynamic languages for .NET, with language interop and hosting support.

Active Directory authentication for DNN. (Moved to GitHub)

DotNetZip is a FAST, FREE class library and toolset for manipulating zip files. Use VB, C# or any .NET language to easily create, extract, or update zip files.

EasyHook starts where Microsoft Detours ends. Supports extending (hooking) unmanaged code (APIs) with pure managed ones, from within a fully manage environment.

This is an add-in for Reflector - it generates code and resource files for a selected assembly, module, namespace, or type. It also creates a VS project file to see the generated files in Visual Studio. Note that this project does NOT contain Reflector.exe. You have to download that assembly and reference it in the project to compile it.

Fissum in a TFS tray icon client. Fissum provides a fast access to your work items directly from a tray icon menu.

IronPython is a implementation of the Python programming language on the .NET Framework. It supports an interactive interpreter with fully dynamic compilation.

IronPython development environment running as VS Shell Isolated application

The Managed Extensibility Framework (MEF) is a library in .NET that enables greater reuse of applications and components.

The MSBuild Extension Pack provides a collection of over 480 MSBuild Tasks, MSBuild Loggers and MSBuild TaskFactories.

My Web Pages Starter Kit is a simple yet powerful file based content management system for small websites.

NetDefender is a Free Firewall with source code, which can be downloaded along with firewall executables. Netdefender works on windows 2000 and windows XP.

This project contains the latest updates for the Network Monitor parsers. All parser development has been done through this CodePlex site since November 2008, and we welcome your input as well as your parser bug reports.

Add-Ins for .NET Reflector

Managed 7-zip library written in C# that provides data (self-)extraction and compression (all 7-zip formats are supported). It wraps 7z.dll or any compatible one and makes use of LZMA SDK.

Silverlight Toolkit and Silverlight for Windows Phone Toolkit are a set of Microsoft components for developers.

The Source Outliner PowerToy provides a tree view of your source code's types and members and lets you quickly navigate to them inside the editor. Source Outliner enables you to perform the following tasks: • Navigate a C# or Visual Basic source file in a tree view. • Navigate to an item via the keyboard or the mouse. • Filter the tree based on the code element name. • Filter the tree based on the code element type.

A program to see what all those svchost.exe are running.