0 A.D. (pronounced "zero ey-dee") is a cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of ancient civilizations, each depicted at their peak of economic growth and military prowess.
ABC Path Solver is a Perl program and library that automatically solves an ABC Path game while giving the reasoning. ABC Path is a puzzle game in which one should position the letters from "A" to "Y" in a 5*5 grid based on clues. It is featured in brainbashers.com. ABC Path Solver uses a mixture of deduction and solving by trying several branches, which should allow it to solve all initial boards.
Armadillo adventure is an adventure game set within a world. It is a codebase, a toolkit for making your own adventures such as King's Quest. The toolkit has an example adventure program that can be easily changed and enlarged by derivation. If you are more interested in dungeoneering games, take a look at the <a href="http://freshmeat.net/projects/tanirs-quest/">Tanir's Quest</a> project.
Aviation is a flight simulator meant to be somewhere in between accurate but complicated simulators and simple toy simulators that don't provide any level of realism. It currently features a non-linear flight model, a configurable atmosphere and sky model, and a CLOD triangulation engine for the terrain. Currently Aviation allows you to fly around in an area of around 600 square kilometers centered around the Columbia river. It can be easily extended to implement combat or air race scenarios, for example.
Bart is a puzzle-style game. In a maze, there is a human and several monsters. The human wants to escape (reach the "exit" point). The monsters, as you may have already guessed, want to eat him for breakfast. The human is in a panic, and you cannot control him at all! He runs in a straight line until reaching a wall, and then turns in a random direction and runs again or explores the maze. One way exists to help the human: you may rotate walls.
Berusky 2 is a game that challenges your visual/spatial thinking and ability to find a way to resolve a logic task. Using five bugs, you'll go through an adventure full of various puzzles spread across nine episodes. Individual episodes differ in appearance and difficulty, which increases throughout the game.
C-Dogs SDL is a port of the old DOS arcade game C-Dogs to modern operating systems. C-Dogs is an arcade shoot-em-up which lets players work alone or co-operativly during missions, and against each other in the "dogfight" deathmatch mode. The original DOS version of C-Dogs came with several built in missions and dogfight maps, and this version is no exception. The author of the DOS version of C-Dogs is Ronny Wester.
Chocolate Doom is a Doom source port which aims to behave as closely as possible to the original DOS Doom executables ("Vanilla Doom"). It aims to be compatible with DOS Doom demos, configuration files, savegames, and bugs. As far as possible, it provides the same features that are available in the DOS version, along with the same "feel" of the original game.