PLIB

PLIB is a suite of free and open-source libraries to ease the development of computer games. It was originally written by Steve Baker in 1997 and licensed under the LGPL.

PLIB includes sound effects, music, a complete 3D engine, font rendering, a simple windowing library, a game scripting language, a GUI, networking, 3D math library and a collection of utility functions. All are 100% portable across nearly all modern computing platforms. Each library component is fairly independent of the others to encourage replacement with other libraries like SDL or FLTK.