fichee (the real name is unpronouncable for people not speaking german) is a game usually played by kids in school on their tables using coins and set squares, which now can be played onscreen. It is written in C using libSDL. Platforms: BSD, Mac, Linux

JDiplomacy is a multiplayer, online version of the famous strategy game. 1 To 7 players. A Java client connected to a Google Appengine application. Platforms: Windows, Mac, Linux

PyBEM is a simple project: Python. Play by Email. That's it :) We're providing tools to help people create and run their own turn-based strategy games via email, in a language that's simple to learn, and using a system that's easy to modify. Platforms: Windows, Mac, Linux

Pioneers is an emulation of the board game The Settlers of Catan, which can be played over the internet. Platforms: BSD, Windows, Mac, Linux

A strategic turn-based game, based on Battle of Wesnoth engine, to make to live again the ancient Glory of the Celts, where the respect for the nature and the observance of the mystic was stirred in the life every day. Platforms: Windows, Mac, Linux

A web-based game in the spirit of Archmage of a post-apocalyptic future. A jsp-based MMORPG where users control empires spanning many worlds. Writers and artists welcome. Employing Struts MVC, Tomcat, mySQL, and Java. Knowledge of design patterns helpful Platforms: Windows, Mac, Linux

This is a tool that helps map authors for the game Battle for Wesnoth to create symmetric maps. Platforms: Windows, Mac, Linux

The Freya Game Engine is a cross platform Java API for writing multiplayer turn based games. The engine produces XML turn descriptions based on XML command files and XML data dictionaries. Platforms: Windows, Mac, Linux

Galactic strategy Open Source browsergame. Replacement of the former game Net-Assault. Platforms: Windows, Mac, Linux

0 A.D. (pronounced 'zero ey-dee') is a free, open-source, cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of six ancient Western civilizations, each depicted at their peak of economic... Platforms: Windows, Mac, Linux

ANother IMplementation Of Scotland Yard - Java implementation of the Ravensburger board game 'Scotland Yard'. While the program takes the role of Mr. X, you have to coordinate the detectives in order to catch the fugitive. Platforms: Windows, Mac, Linux

Tyrant is a graphical roguelike fantasy adventure game. It features intricate randomly generated landscapes, towns and dungeons. It is written in Java with a highly extensible game engine. Platforms: Windows, Mac, Linux

Java mulitplayer strategy game. Adaptation of KDE Galaxy Conquest. (rules are changed - but still they are very simple). Uses java swing client. Platforms: Windows, Mac, Linux

A Java based virtual Risk-board for internet playing for 2 - 5 players. Contains a client/server UI applet (can also be started as a local application). Includes game saving. Requires a third party chat program for keeping contact with other players. Platforms: Windows, Mac, Linux

Realtime strategy game about battles in the American Civil War. Features network play, fancy graphics and audio. Platforms: Windows, BSD, Mac, Linux

An open-source rewrite of the popular roguelike game Angband. Written in Common Lisp. Platforms: Windows, Mac, Linux

Save game editor for Master of Magic - the best game ever ! Platforms: Windows, Mac, Linux

DevGame to darmowy silnik gry typu via WWW. Jest oparty wyłącznie o PHP i MySQL. Platforms: Windows, Mac, Linux

Multi User Dungeon game written in 100% Java.Developers wanted for this project.A new MUD is open for developers only. It is written entirely in Java 1.3.1 from scratch. The coding interface is very similar with lpmud programming. Platforms: Windows, Mac, Linux

Arcanium is a fantasy multiplayer realtime strategy game. It has been developed at University in 13 weeks by 6 students using Java and is in beta stage now. The source is released completely under GNU GPL. Platforms: Windows, Mac, Linux