roll is a command-line program that rolls a user-defined dice sequence and displays the result. The die are defined using dN, where N is the number of sides. They can be rolled multiple times by prepending the number of repetitions (e.g., 3d6) and used in simple mathematical expressions (e.g., 2d8+4).
Epiar is a space adventure/combat game where you begin as a shuttle pilot in a galaxy generally ruled by anarchy, with few stable governments and numerous rebel factions. You start your adventure off doing whatever you want, but generally trying to save up money for a new starship, your adventure taking off from there.
LambdaRogue is a rogue-like role playing game set in a strange underworld. Men and the species of Drekh'nar once lived peacefully together on Earth, both not far away from reaching the stars with spaceships. A misunderstanding led to war before these dreams could be realized. After a long and bloody battle, a peace treaty was created, forcing mankind to go underground. Mankind has lost the most of its technological knowledge, but Ahna, a priestess, is searching for the Book of Stars, which could bring humans back to the surface and beyond. And you are Ahna's agent.
The Z-machine Preservation Project is a Java implementation of the Z-machine (Java version >= 5 is required) specification. This Z-code interpreter can be run either as a standalone application or as an applet within a Web browser. It runs Interactive Fiction created by Infocom as well as those compiled with Inform, and targets all existing story file versions. Features include saving the game state, multimedia support (graphics, sound effects, meta data), colored and styled text, undo, and timed input as well as support for different languages. Games in the Inform 7 release format are supported as well (Treaty of Babel specification).