Airrace is an air race game where the player is required to pilot a plane through sets of pylons in a prescribed order. The flight model is pretty realistic in that it features most of the effects that make flying an aircraft challenging but without having to worry about what several dozens of buttons on the dashboard do. Right now, seven training tracks and five race tracks are available. Airrace has been written on top of Aviation and Techne.
Billiards is a cue sports simulator. It aims for physical accuracy and simplicity. It should be useful for practicing billiards on your own and against your friends when a real pool table is not available. Both a pool table and a billiards table (that is, with and without pockets) are implemented, allowing you to play eightball, nineball, and carom billiards games.
The Crate Game Engine is a game engine that is designed to make creating games trivial. The rendering and scripting engines are removed from the game engine to make the specialization of games as easy as possible. Currently, scripting support is implemented to allow a Lua script to be put directly in the game file, which can be validated as XML. Multiplayer text based adventure-style games can be played with the existing console rendering engine.
Excalibur: Morgana's Revenge (EMR) is a first-person shooter game with an epic and in-depth story line. The player travels through time in the Jurassic period, Camelot period, and into the future to chase down Morgana. Using the Aleph One engine, EMR creates an amazing new world, making it an entirely fun and unique gaming experience.
Five Hundred is a card game for four players similar to Euchre or Bridge, especially popular in Australia and New Zealand. The wikipedia page has a comprehensive description of gameplay. This version is implemented in C++/Qt. It incorporates graphics from the svg-cards project. Computer players are scriptable in Lua.