As we do every summer, we've pulled together our list of 101 of the "funnest" open source apps ever created. Of course, most of these are games, but there are also a few fun non-games at the end of the list.
This year, we've updated the list with quite a few new entries, as well as eliminating some of the older titles that are no longer being maintained.
Many commentators have noticed that open source and Linux are starting to attract more game developers. Hopefully, the trend will continue and we'll have even more open source games to consider for next year's list.
Please note that this list is not a ranking—the apps are organized into categories and then in alphabetical order within each category. As usual, if you'd like to draw our attention to any games we might have missed, feel free to use the comments section below.
This is a remake of the classic Bomberman game where you blast your way out of a puzzle using bombs and other tools. Up to five players can play at the same time on the same system, or you can play against the computer. Operating System: Windows, Linux.
Short for "Battle Zone Capture the Flag," BZFlag is a multiplayer, online 3D tank game. More than 300 people run online servers, so it's usually pretty easy to find a game to join. Operating System: Windows, Linux, OS X.
Chromium B.S.U. describes itself as a "fast-paced, arcade-style, top-scrolling space shooter." Game play is intentionally difficult, with typical games lasting less than 15 minutes. Operating System: Windows, Linux, OS X.
The website sets up the Legend of Edgar this way: "When Edgar's father fails to return home after venturing out one dark and stormy night, Edgar fears the worst: he has been captured by the evil sorceror who lives in a fortress beyond the forbidden swamp. Donning his armour, Edgar sets off to rescue him, but his quest will not be easy..." It's a 2D platform game with plenty of running, jumping, battles and puzzles. Operating System: Windows, Linux, OS X.
Imagine a platform game where the main character is a poet and all the graphics look like stick figures. This unusual minimalist game also features haunting music and words as part of the landscape. Operating System: Windows, Linux, OS X.
6. Open Sonic
Like Sonic Robo Blast (below), Open Sonic is based on the well-known Sonic the Hedgehog series, but this version is 2D, not 3D. It's available in multiple languages, and you can create your own levels with the level editor. Operating System: Windows, Linux, OS X.
If you ever played the arcade game Galaga, Powermanga will feel familiar. This 2D space shooter includes 41 levels and more than 200 sprites. Operating System: Linux.
In this updated version of the Scorched Earth tank game, you can take on up to 24 online opponents or just play against the computer. The 3D graphics are remarkably detailed, and the landscape alters realistically as the missiles and shells make impact. Operating System: Windows, Linux, OS X.
As you might expect, this platform game is inspired by the Sonic the Hedgehog series. It's a 3D game with plenty of levels and speed. Operating System: Linux.
This game is similar to the classic 2D, side-scrolling Mario games, except that it features Tux the penguin instead of plumbers. It comes with 26 levels of play. Operating System: Windows, Linux, OS X.
Who wouldn't love a game about collecting mushrooms in space? This unique game also has elements of a simulator—you collect mushrooms and bring them back to your base to earn profits. Operating System: Windows, Linux.
In this 2D, side-scrolling action game, you guide your cartoon-like character through a variety of landscapes while battling up to 16 other online players. It also includes the ability to design your own maps. Operating System: Windows, Linux, OS X.
This game of "convivial mass murder" features well-known free and open source software mascots (gnus, penguins, firefoxes, etc.) It offers plenty of weapon choices and requires only a minimal amount of strategy. Operating System: Windows, Linux, OS X, Android.
Collect the strawberries while avoiding the wreckers as you ride your motorbike through this 2D side-scroller. Playing all the way to the end is particularly challenging. Operating System: Windows, Linux, OS X.
15. Yo Frankie!
Thanks to the open source animation tool Blender, Yo Frankie! offers incredible 3D graphics. It features animal characters from an open source movie project called Peach. Operating System: Windows, Linux, OS X.
This is a Java-based adaptation of the board game Risk. There are a few differences from the original board game, but it should feel very familiar to most players. Operating System: Windows, Linux, OS X, Android.
17. The Genius
Play the classic game of chess against another human or an AI player. The interface is easy to understand, and it offers four levels of play for anyone from a first-time player to an expert. Operating System: Windows.
18. GNU Backgammon
Just like a human player, the AI player in this app is getting better at playing backgammon all the time. Challenge yourself by playing a game or use the engine to analyze and improve your play. Operating System: Windows, Linux, OS X.
With this version of Scrabble, you can choose to play the classic board layout or try your hand at 3D Scrabble or the 21x21 SuperScrabble Board. You can compete against the computer or against up to three online players. Operating System: Windows, Linux, OS X.
One of the better Texas Hold 'Em apps you'll find anywhere, PokerTH offers great graphics and an intuitive interface. Register at Poker-heroes.com to join an online game and see where everyone stands in the rankings. Operating System: Windows, Linux, OS X, Android.
With this app, you get more than 1,000 different versions of Solitaire in one convenient package. Features include multiple card decks and backgrounds, sound, unlimited undo, hints, demos and more. Operating System: Windows, Linux, OS X.
This game offers gameplay that is a realistic version of games played on billiards or pool tables. The 3D graphics are nice, but it lacks sound and some other features that you might expect in commercial software. Operating System: Linux.
23. Cube Trains
In this unique puzzle game, you have to connect city tunnels and tracks in a very confined amount of space. It comes with nine levels, or you can buy the $2 expansion pack that gives you eleven more levels. Operating System: Windows, Linux, OS X.
Inspired by Atari's Oxyd and Amiga's Rock'n'Roll games, this popular game has been downloaded thousands of times. The goal is to find matching pairs of stones while avoiding traps and obstacles and solving puzzles and mazes. Operating System: Windows, Linux, OS X.