Renderer for flam3 cosmic recursive fractal flames implemented on GPU. Requires a CUDA-capable graphics card.
WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice
Camelia is an IDE for OCaml designed with students and new users in mind. It sports syntax highlighting, tool-tip type checking, clickable error explanations, an integrated debugger, and more.
banshee-- A toolkit for building constraint-based program analyses
SPEmatic is an interpreter for SPE-style string-rewrite rules meant for use by students and instructors in introductory courses on phonological theory (a subfield of linguistics that deals with how sounds function in the grammars of natural languages).
VSGE is a platform-independent, "very simple" game engine based on the SDL and OpenGL libraries. Using unorthodox technologies when appropriate, it strives to make developing non-trivial games simple and fun.