Access a library of functions for computer games written for the DJGPP compiler. Read license information or contact the contributors.

Provides a version of C designed for scientists and engineers.

FFTW is a fast C library for computing the FFT. View benchmarks comparing it to other FFT implementations, or download it.

Sells an Objective-C compiler that runs on a variety of platforms. Includes ordering and technical support.

Company translates Java class files into C source code, but only deals with stand-alone applications, not applets.

IMSL product line includes a C numerical library, with expanded statistical functions, reorganized documentation and equation support.