TuxMathScrabble challenges young people to construct compound equations and consider multiple abstract possibilities. There are four skill levels for practice, from basic addition and subtraction through multiplication and division. This software includes a data recorder interface for student performance assessment.
Gomoku.app is an extended TicTacToe game for GNUstep. You win the game if you are able to put 5 of your pieces in a row, column, or diagonal. You lose if the computer does so before you. You can play the game on boards of different size. The game has 6 different difficulty levels.
Scid is a powerful chess database application with many search features. Its GUI makes entering chess games fast and easy, and you can search games by exact position, material, player names, and many other criteria. It does not come with any actual file of chess games, but it can convert databases to/from the popular PGN format which is widely used for chess games.
CHEOPS (CHEss OPponent Simulator) is a fully-functional AI chess program capable of human vs. human, human vs. computer, and computer vs. computer play. It uses a 64-square linear array board representation. The game tree search is alpha-beta, and the static evaluation function considers material, mobility, and motif features. CHEOPS comes with extensive documentation on the program internals, aimed at students or programmers wishing to understand or extend the system.
MegaMekNET is based on FASA's Classic Battletech boardgame. It lets you join the war for the Inner Sphere. The game allows you to join a house and lead units of towering Meks against other players online from around the globe. Crush the other houses beneath your armoured feet in this turn-based strategy game. You and your team fight to resurrect the Star League.