Here’s an interesting open source project on Kickstarter the magical robotic arm, Dobot:
Designed for DESKTOP. Arduino-powered, 4-axis parallel-mechanism robot arm with High Quality. For makers, educators, and everyone!
We are six engineers who built a 4-axis high accuracy, high repeat precision, stepper motor, Arduino-based, desktop robotic arm called Dobot.
You can visit his Kickstart page for more info.