PJRC Teensy 2.0 Keyboard Controller / USB Development Board w/ Pins

Teensy 2.0 USB Development Board
Includes header pins
C Language Programmable
Requires Mini-B USB cable (not included)
The Teensy 2.0 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 Teensy 2.0 version features header pins to directly plug into a solderless breadboard.
All Teensy boards are tested before shipping.