TORCS - TORCS, The Open Racing Car Simulator is a highly portable multi platform car racing simulation.
Unity - The multiplatform game creation tools for everyone.
TrackMania - The most popular online PC racing game.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Need for Speed - Official site of Need for Speed Payback, an action driving fantasy that's the newest game in the popular car racing video game franchise, Need for Speed.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.