ALinq.org
Freeware
An entity visual designer for ALinq. it's integrate with VS2008 and VS2010.
1
Travis Robinson
865
Freeware
You can use .NET C# USB library for WinUSB, LibUsb-Win32, and libusb-1.0.
Madwizard Thomas
18
Open source
It is a .NET class library that provides easy access to the WinUSB API.