Object-Oriented Graphics Rendering Engine (OGRE) is a scene-oriented, real-time, 3D rendering engine, as opposed to a game engine. OGRE is cross-platform and abstracts from the underlying system libraries, like Direct3D and OpenGL.
License: Open Source
OGRE is primarily a rendering engine that offers flexibility and a lightweight structure, making it ideal for custom graphics applications. Torque 3D, on the other hand, is a comprehensive game engine with built-in tools and features, providing an all-in-one solution for game development.