From Pigmeo Development Wiki
Pigmeo Development Website
Pigmeo is a free multiplatform software project which aims to provide a set of compiler, framework and utilities for developing applications for microcontrollers and embedded systems. Those apps for microcontrollers can be written in any .NET language such as C#, Visual Basic .NET, Nemerle, IronPython, C++/CLI... and use any class available in the .NET Framework, plus the classes available in the Pigmeo Framework.
If you are not a Pigmeo developer, you should be visiting the Pigmeo official website