.NET

Homepage: http://www.microsoft.com/net

Microsoft's unified framework for Windows applications, also known as CLR.

The premier .NET language is C#, though others exist: C and C++ code can be grandfathered into .NET applications, though it is not well supported.
 * Boo
 * F#
 * IronPython
 * IronRuby
 * JavaScript
 * Visual Basic