.NET Gadgeteer

10.22: news.adds/openware/.NET Gadgeteer:
. the .NET Gadgeteer
 was created by researchers at Microsoft
as an internal prototyping tool,
but because of external interest,
particularly from educators and hobbyists,
MS turned it into open source software
which now has a vibrant hardware ecosystem
from multiple manufacturers.
The platform is built on the .NET Micro Framework,
which allows small devices to be
programmed in the C# language
and make use of Visual Studio's developer tools .
. components can be bought here .
. it is praised for being simple to build and code,
and for offering processors clocked at
several times the speed of those on
the vast majority of Arduino boards.
However Gadgeteer modules also cost more
compared to modules for the similar
Grove prototype system.