Steer your car or tank with the mouse! Sort of. Because of game limitations, it's not possible to follow the mouse cursor itself.
This mod adds a "Steering Remote". Click the steering remote on the ground and your car will turn in that direction. (This is different to turning to face that spot, because it won't adjust the direction as you drive past the spot you clicked.)
The mod is as efficient as I know how to make it, and of course, multiplayer-compatible. Please let me know in the GitHub issues if you have any, well, issues!