Rogue Robotics (Popularity: )
http://www.roguerobotics.com/ Manufacturer of Rogue Blue robot kits and expansion kits, as well as SIMMSTICK products - Stamp Sticks and SimmBread Board.
Joker Robotics (Popularity: )
http://www.joker-robotics.com/ Developer, manufacturer, and distributor of mobile robot kits and components for research and educational use. Based in Stuttgart, Germany.