Microchip's/Digilent's Max32 microcontroller board.
I work for Digilent (one of the makers of the chipKIT boards) and we're doing a project series involving them. I've completed the Uno32, uC32, and the Max32. Fritzing has been a valuable resource for us!
Digilent chipKIT hardware files are licensed under the Creative Commons-Attribution-ShareAlike license. This license allows for both personal and commercial derivative works, as long as proper credit is given to Digilent and the designs are released under the same license.