Torque
From Graal Bible
Torque is a game engine created and distributed by GarageGames, Inc. It is available on many platforms and, like Graal, features its own versatile scripting language: TorqueScript. It has powerful 3D and networking capabilities, and can compile for Windows, Linux and Mac, which makes it possible for Graal and the upcoming Graal3D to run on these platforms as of v3.00.