Warbots Xtreme - Official site of Canada's largest robot event.

Fingertech Robotics - Not only does the guy build cool bots, he sells parts and kits online!

RobotCombat.com - Good site and pretty much every bot part you need.

Lynxmotion - Good motors and other robot stuff!

Banebots - Good budget motors and electronics.

Mcmaster - The place to get all those hard to find fasteners and hardware.

Online Metals - Good selection, decent prices, where I get most of my metal.