Single-player, text-based, dungeon simulation game

angband

Single-player, text-based, dungeon simulation game

Angband is a single-player, text-based, dungeon simulation derived from the game Moria, which was in turn based on Rogue. It is often described as a "roguelike" game because the look and feel of the game is still quite similar to Rogue (though there are now graphical tiles available if you dislike ASCII gaming). Angband has been in more or less continuous development since the early 1990s.
brain teaser game and trainer to have fun and to keep your brain trained

gbrainy

brain teaser game and trainer to have fun and to keep your brain trained

gbrainy is a platform to train memory, arithmetical and logical capabilities with many sorts of different exercises of different difficulty levels. It should have something for all ages and purposes: kids whose parents want them to develop their capabilities, adults that want to keep their mind in form or just try it out for fun, older people that might need to do some memory exercises, etc.
networked BattleShip game

gbatnav

networked BattleShip game

Batalla Naval is a networked BattleShip game. It supports multiple players and multiple robots at the same time.
Rewrite of the Heroes of Might and Magic 3 game engine

vcmi

Rewrite of the Heroes of Might and Magic 3 game engine

The purpose of VCMI project is to create a free implementation of the "Heroes of Might and Magic 3: In the Wake of Gods" engine to overcome limitations of the original engine for better modding support, higher resolutions, bigger map sizes and extended engine limits.
v 0.8

kmahjongg

mahjongg solitaire game

KMahjongg is a solitaire game where the player removes matching Mahjongg tiles to clear the board. A variety of tile layouts are included, as well as an editor to create new layouts.
3D racing cars simulator game using OpenGL

torcs

3D racing cars simulator game using OpenGL

TORCS, The Open Racing Car Simulator, is a car racing simulation game which allows you to drive in races against opponents simulated by the computer.