A modern version of the DOS Scorched Earth, Scorched 3D is an artillery game. In other words, you use your tanks to blow up your opponent's tanks. You can play against up to 20 human or computer-generated opponents at a time. Operating System: Windows, Linux, OS X.
This Sokoban (Japanese for "warehouse keeper") puzzle game requires you to pull, never push, crates one at a time until you achieve the desired configuration. It's both simple and addictive. Operating System: Windows
This open source version of Dance Dance Revolution, lets you test your rhythm. You can use dance pads or just play with the keyboard. Operating System: Windows, Linux/Unix, OS X, XBox.
In this 3D racing game, Tux the Linux penguin zooms around one of 20 tracks. The graphics are mediocre at best, but it does offer many game modes and multiplayer options for added excitement. Operating System: Windows, Linux, OS X.
Short for "The Open Race Car Simulator," TORCS is both a fun game and a research platform. While the graphics are better than SuperTuxKart, they're still not anything particularly special. However, the game does offer a lot of different cars and tracks to keep you entertained. Operating System: Windows, Linux, OS X.
Tremulous combines a first-person shooter game with a strategy game. Play as an alien or human as you try to destroy the opposing team and eliminate their ability to spawn. Operating System: Windows, Linux, OS X, XBox.
In the year 2084, you must control a secret organization charged with defending earth from an alien invasion. Nice visuals and control over the speed of time's passage make this turn-based strategy game fun and exciting. Operating System: Windows, Linux, OS X.
26. Ultrastar Deluxe
Inspired by SingStar, Ultrastar Deluxe is a competitive karoake game where you score points for singing on key and in the right rhythm. Many backgrounds and songs are available or you can create your own. Operating System: Windows, Linux, OS X.
No, that's not a typoit really is War-sow sow, as in pigs. In this first-person shooter you'll dodge rocketlauncher-wielding pigs and lasergun-carrying cyberpunks as you complete amazing athletic maneuvers. The gameplay is fast, and the unique cartoonish visuals add to the fun. Operating System: Windows, Linux, OS X.
In this turn-based game, you must kill the zombies before they kill you. And you can choose how much the blood splatters with the gore settings. Operating System: Windows, OS X.
If you're tired of staring at your cubicle walls, why not take a break and fly around the galaxy for a while. Celestia lets you see the skies at any time from any point in the known universe, using real images wherever possible. Operating System: Windows, Linux, OS X.
If you're thinking of taking up astronomy as a hobby but don't want to buy a telescope or stay up late, try Stellarium. It offers a view of the night skies from any point on earth, and it's so accurate, it's even used by many planetariums. Operating System: Windows, Linux, OS X.
Tell the world what you've been doing this summer by starting your own blog. WordPress offers a great, open-source platform and walks you through the steps of fining a Web host, downloading the software, and writing your first post. Operating System: OS Independent.
Some people (and you know who you are) think it's fun to organize their collections of books, CDs, DVDs, video games, stamps, coins, etc. If you're one of them, Data Crow will let you track your stuff (including who borrowed what), and it imports data from online services like IMDB and MusicBrainz. Operating System: OS Independent.
Designed for the Barney-loving age group, ChildsPlay offers a set of fun and mildly educational activities. It includes memory matching and letter recognition acitivies, as well as Pac-Man and Pong. Operating System: Windows, Linux, OS X.
For kids up to age 10, GCompris provides more than 100 things to do on a summer afternoon. In addition to activities designed to teach children about math, science, reading, and geography, it also includes games like chess, memory, connect 4 and Sudoku. Operating System: Windows, Linux.
If you have to do math in the summer, you should at least get to blow things up at the same time. In this game, kids stop comets from destroying Tux the Linux penguin by solving simple arithmetic problems. Operating System: Windows, Linux, OS X.
36. Tux Paint
Also for the younger crowd, TuxPaint allows children to create their own artwork masterpieces. It includes paintbrush, rubber stamp, line, shape and text tools, as well as "magic" special effects. Operating System: Windows, Linux, OS X.