Meet the Ada Hand: a fully articulated robotic hand with 5 degrees of freedom and PC/Mac control. Its PCB is based around the ATMEGA2560 microcontroller and can be programmed using the Arduino programming environment. The kit can be assembled in around 1 hour using simple tools.
You get actuators, fingertip grips, bolts, power supply, 3D printed parts for the hand, and everything you need to get started. The Ada Hand costs 500 pounds at this time.