XAML Power Toys is a Visual Studio 2008 SP1 Add-In that empowers WPF & Silverlight developers working in the XAML editor. Its Line of Business form generation tools, Grid tools, DataGrid and ListView generation really shorten the XAML page layout time.
The kit includes drag 'n drop Controls and Components, SmartTags, VB.Net and C# source code for all tools and samples as well as complete QuickStarts, APIs, and documentation.
IronPython Studio is a free full IDE for the Python programming language based on the existing IronPython example and the Visual Studio 2008 Shell runtime ... and doesn't need Visual Studio installed
Pex (Program EXploration)
is an intelligent assistant to the programmer.
By automatically generating unit tests, it helps to find bugs early.
In addition, it suggests to the programmer how to fix the bugs.
Pex is actually a unit test generation tool. It takes a parametrized unit test and generates parameter sets to get full code coverage and exercise all of the code. It actually analyzes the code to find appropriate values, and then generates normal (unparametrized) tests.
ASP.NET MVC provides model-view-controller (MVC) support to the existing ASP.NET 3.5 runtime, which enables developers to more easily take advantage of this design pattern. Benefits include the ability to achieve and maintain a clear separation of concerns, as well as facilitate test driven development (TDD).
Solution Factory is a Visual Studio Addin that exports a solution as a Visual Studio multi-project template, so you can provide best practices for specific development project types.