Arx Libertatis is a cross-platform, open source port of Arx Fatalis, a 2002 first-person role-playing game developed by Arkane Studios. Arx Fatalis features crafting, melee and ranged combat, and a unique casting system where the player draws runes in real time to effect the desired spell. The Arx Libertatis source code is based on the publicly released Arx Fatalis sources. This does however not include the game data, so you need to obtain a copy of the original Arx Fatalis or its demo.
ca-ga is a toy artificial life simulation that uses genetic algorithms on large cellular automata. It uses simple but easily extended DNA that is 8k long by default, though you can take the size out to anything you have time to evolve. It sits under each cell of a 128x128 board and orders operations to transfer energy in the hopes of achieving a kill and breed. The simulation features a mutating fitness function, emergent sex, and a proof of concept real world fitness function. After enough generations, the cells or genes could achieve collectivism and organismhood, coordinating the values of the hotspots that determine board temperature in order to maintain a desired equilibrium. But maybe not. If you work in a fitness function, an optimizing problem solver results.
NoSpex is a Python scripted realtime graphing library designed to be easily employed by security consultants and reverse engineers for teasing apart and depicting the relationships between processes in a system under analysis. It is realtime in the sense that the graph is continuously rendered and animated as new relationships are introduced. It is easily employed in the sense that all the bookkeeping is done by the Python module and exposed using a simple thread-safe API. NoSpex relies on the SDL graphic library for a frame buffer and Cairo for rendering to the frame buffer. This combination produces a fast and visually elegant graph that should be portable wherever SDL and Cairo can be found.
dsi is a simple game of invading aliens. You must stop those aliens from landing on you. It features smooth scrolling, high scores, 5 levels, simple controls, sound effects, and user selectable music. Working joystick support. Watch out for the tenacious mega! The graphics can be customized out of the box without requiring any recompiling. A simple definition file can be customized for coders.
Octaspire Crates! is a scriptable, skinnable, extensible, and relocatable 3D action puzzle game. All the missions, game entities (or crates), game states, and configuration of the game engine are implemented as plain text Lua-scripts. So, if you know Lua, you can write new game entities, game states, missions, and levels with any text editor, without any special development tools. New skins can be created with any image editor that can save .png images, dropped into a new subdirectory under the resources/textures directory, and changed in the configuration file config.lua. Crates has also its own (simple) implementations for all the different container classes it needs (like vector, string, and so on) to keep the external dependencies fewer.