This proof of concept Lunar Electric Rover simulator was designed by Frassanito and Associates, in conjunction with Petter Sundness, Rommany Allen, and Chilton Webb. This simulator is based around NASA's Constellation Program architecture.
It lets you drive the LER around on the moon, dock with the base stations, and test its multiple cameras and views. It also shows ascent, descent, possible design for LOX refueling stations, the Athlete, the Lunar Electric Rover, and the Lunar EVA suit. It is based on available data and file footage of the actual Constellation architecture, and approximate lighting conditions at one of the possible lunar base sites