Rover Robotics 4WD Rover Pro – Extremely Rugged and Capable Mobile Robotics Platform – Oz Robotics
Compass C2 Robot Platform – Oz Robotics
TIAGo Base - Autonomous Mobile Robot - PAL Robotics
Configurable - IG32-SB4, 4WD All Terrain Robot Platform
Amazon.com: Moebius Metal Mecanum Omni Wheel Robot Car Kit with 4pcs DC 12V Speed Encoder Motor, 4WD Robot Platform Chassis Maximum Load 15KG for Arduino/ Raspberry Pi DIY STEM Educational Competition :
Machine Lab - MMP-40 Mechanical Mobile Platform- Two Motor With Black Tracks & Encoders #MMP40TBE
Inspectorbots Mega Bot Wireless 4WD Robot Platform - RobotShop