Can be used to easily view information like position, velocity, and orientation of the car and of the ball in free play. Check the 'Show HUD' box in the plugins tab to make the panels appear.
Furthermore, some experimental features like logging information to a file each physics tick, and overriding car input. I haven't touched these features in a long time.
Check the source for more information: https://github.com/AratorRL/SciencePlugin