This is an interactive tool for creating random fractal planets and terrain areas with oceans, rivers, lakes and icecaps. The results can be exported as models to POV-Ray and to Blender, or as texture maps for more general usage.

bugsx is a program which draws biomorphs based on parametric plots of Fourier sine and cosine series and let's you play with them using genetic algorithms.

Eureka is a cross-platform map editor for the classic DOOM games. It started as a fork of the Yadex editor attempting to make it use the FLTK GUI toolkit and implement multiple Undo / Redo.

GNU `m4' is an implementation of the traditional UNIX macro processor. It is mostly SVR4 compatible, although it has some extensions (for example, handling more than 9 positional parameters to macros). `m4' also has builtin functions for including files, running shell commands, doing arithmetic, etc. Autoconf needs GNU `m4' for generating `configure' scripts, but not for running them.

High-level wrapper around a subset of the OpenSSL library, includes

Instead of offering an HTML5 player to modern browsers and a totally separate Flash player to older browsers, MediaElement.js upgrades them with custom Flash and Silverlight plugins that mimic the HTML5 MediaElement API.