Hey, dev here for Robomaker. Most relevant line from our overview page is probably "AWS RoboMaker is the most complete cloud solution for robotic developers to simulate, test and securely deploy robotic applications at scale."

The main feature is the on-demand cloud hosted version of the robotics simulator gazebo ( http://gazebosim.org/ ) that allows you to run your robot's code in a 3d physics environment. You can then take that tested/verified code and deploy it over the air via our fleet management features to your actual robot.