Teensy++2.0

From the PJRC Store: The Teensy++ USB Development Board is a complete USB-based microcontoller development system. Only a standard Mini-B USB cable (sold separately) is needed to connect to a PC or Macintosh. This version features header pins to directly plug into a solderless breadboard. The Teensy is also available without the header pins. All Teensy boards are shipped assembled and fully tested. There is a drag and drop interfacing software available from the website linked - I am not the creator or seller - I am using this board to interface my CNC Control Panel to my PC.