The Pololu serial 8 - servo controller allows you to control up to 8 RC servos with almost any robot controller or computer. Connect multiple units to the same serial line to control up to 128 servos independently.
The HD2 tracked platform is a large, heavy duty tracked robot with the power to pull a truck and climb stairs. A wealth of internal space allows for batteries, controls and an optional computer. Customized version of item TP-200-001.