Netrek is a 16-player two-dimensional graphical real-time battle simulation with a Star Trek theme. A game is divided into two teams of 8 players (or fewer), who dogfight each other and attempt to conquer each other's planets. Netrek is the probably the first video game which can accurately be described as a "sport". It has more in common with basketball than with arcade games or Quake. Its vast and expanding array of tactics and strategies allows for many different play styles; the best players are the ones who think fastest, not necessarily the ones who twitch most effectively.
Omnitux aims to provide various educational activities based on multimedia elements (images, sounds, and text). Possible activity types are associations, puzzles, counting activities, etc. There is support for multiple languages and multiple screen resolutions (by using SVG vector graphic files and high quality bitmap files). Omnitux activities are described in XML files, so it is possible to create new activities without modifying the program.
BlindTux is a musical quiz game. The goal is to identify the artist, title, or year of a song by choosing an answer from among 4. The maximum number of players is 4. For now, it is played with the keyboard, but soon players will be able to choose with controls they want: keyboard, gamepad, or maybe buzzer.
Kobold's Quest 1 is a heroic fantasy RPG-Adventure game. The purpose is to play a kobold apprentice magician who learns the way of the wizard on the way through dungeons and so on. The first encounter is in the South Gnarborean woods dungeon with a red dracolich mage. You can cast spells from his spellbook if you defeat him. Furthermore, there is a water dungeon to the far east wherein an assassin mage is said to dwell. Then there are the Nut People who congregate in their little village. Their head magician also has spells for you if you can find him somewhere in the north. The Celestian lords and ladies are said to dabble in the affairs of wizards. A rogue leads you on to their encounter.
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.
Uldramar is a fantasy RPG and adventure game. You can cast spells like the mushroom morph spell and pick up objects for later use. The story is about a plane called Uldramar where there is a quest or two waiting for you. The game was influenced by the Ultima series and the Legend of Zelda.