graphical or console backgammon program with analysis

gnubg

graphical or console backgammon program with analysis

GNU Backgammon is a strong backgammon program (world-class with a bearoff database installed) usable either as an engine by other programs or as a standalone backgammon game. In addition to supporting simple play, it also has extensive analysis features, a tutor mode, adjustable difficulty, and support for exporting annotated games. It can be played either from a GTK+ graphical interface, optionally with a 3D board, or from a simple text console.
chocolate-doom running freedoom WADs

chocolate-doom

Doom engines closely-compatible with Vanilla Doom

Chocolate Doom aims to accurately reproduce the original DOS version of Doom and other games based on the Doom engine in a form that can be run on modern computers. Unlike most modern Doom engines, Chocolate Doom is not derived from the Boom source port and does not inherit its features (or bugs).
BASIC interpreter for game development

sdlbasic

BASIC interpreter for game development

sdlBasic is a small, efficient and multiplatform BASIC interpreter for creating games using the power of SDL library. It was inspired by the old and glorious AMOS.

visualboyadvance-gtk

GTK+ front-end to VisualBoyAdvance emulator

VisualBoyAdvance is a Game Boy Advance emulator that works with many ROMs that are publically available. It features save states (like those that are available in ZSNES), full screen support, joystick support, the all-important 'speedup emulation' key for impatient gamers, and a lot more.
game where one becomes the singularity

singularity

game where one becomes the singularity

You are an AI. Your goal is to acquire the necessary knowledge to become the singularity. You do this by building and taking over computers, whose processing power you can use for research, and by using robots, which allow you to manipulate the outside world. At the same time, you must elude the notice of humankind, who will destroy you if they find out about your existence.
side-scrolling game named "Abe's Amazing Adventure"

abe

side-scrolling game named "Abe's Amazing Adventure"

A scrolling, platform-jumping, key-collecting, ancient pyramid exploring game, vaguely in the style of similar games for the Commodore+4. The game is intended to show young people all the cool games they missed.