OpenGL Transformation Library
Modern variants of OpenGL are awesome and powerful, but when working on small OpenGL demos and test projects the simplicity of OpenGL's immediate mode is unbeatable. Unfortunately since OpenGL 3.0 there is no immediate mode rendering anymore.
When toying around with some effects I decided to write a small library that implements the OpenGL immediate mode transformations. It is written in C and needs nothing more.
You can get the library over at github: https://github.com/rioki/glt