PaulRPG is a Role Playing Game engine. It is intended to allow the devlopment of Final Fantasy style games. (Specifically, Final Fantasy 6.)
The main version uses Windows DirectX and is programmed in RapidQ, a basic-like language developed by William Yu. Plans for a Windows DirectX Visual C++ are knocking around to allow for higher speed.
Previously just 3DGraph
A 3D design and rendering system for DOS systems. (No longer in active development.)