"The iCub is an artificial toddler [robot] with senses, 53 degrees of freedom, and a modular software structure designed to allow the work of different research teams to be combined."
"This open-source robot is designed to allow academics to concentrate on implementing their theories about learning and interaction without having to focus on designing and building hardware, and is part of the general trend towards open source in the field."
You can see a wonderful article by Sunny Bains in EE Times.