Highly customizable full-text search engine
Contao Open Source CMS (fka TYPOlight)
Cross-platform port of Arx Fatalis, a first-person role-playing game
Lightweight extensible wiki engine
XSLT PHP template engine for your views
Evolving Artificial Life
3D world editor for game development
Allows the editing of CSV files using SQL commands
Microbial Counts Trajectories Infinite Mixture Model Engine
Moved to GitHub: https://github.com/flatpressblog/flatpress
Service Management Engine
A live system for creating, publishing, and saving sermon notes.
Cross platform 2D game creation framework with Python bindings
HTTP Bruteforcer
Simple example for triangulate polygon with allegro engine (C++)