Fractal - Beetleweight combat robot
This robot built between 2010-11 is designed to compete in the 3lb combat robot weight-class.
It is very fast and agile, and can climb over objects using both it's tracks and the arm which can rotate 360degrees around its body.
Here's a labelled diagram of the robot:
Here's an image of the first build (circa December 2010) with 11.1v Li-Po and cheap (eBay) 15kg-cm torque modified servo
And finally an image with the top cover (carbon fibre) on: