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FIGS, open and fun! GPL/java game server for many games, and a graphical client. Server works for 16/19 chess variants,adding go, rating system, and haskell AI client soon.
OSpora is an open source java based 2 dimensional client/server mmpog based off of a game released in 1998 called Diaspora. After the game went down, the players have taken it upon themselves to create new versions. This is merely an open source version
Jiso Game3 was a 2D isometric MMORPG project (client/server) written in Java with an Ancient Greece theme. The project is no longer active, but the source code is being made available under a BSD license for anyone who might find it useful.
Thud is a Java client designed to connect to Battletech MUXes and display combat data in a easy-to-read tactical display. It displays a tactical map, contacts list, armor status and more. Note: Sources have moved to github: https://github.com/parkera
AppSignal's MCP server hands Claude, Cursor, or Zed your real errors, traces, and the deploy that shipped them. AI writes the fix; you review the diff.
A Open Source 3D Immersive simulation environment, like the "second life", with some distribuited processing tools, to make the GRID power growup with every new node (client machine) attached.
Yet another implementation of the BloodBowl board game. It uses a client/server setup similar to MegaMek to enable network play. The aim is to fully implement all rules from the Living Rulebook.
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SwingKore. Under development. Visual Plugin for OpenKore, writtin in Java 5. It will clone Ragnarok Client windows. Simmilar to VisualKore and Revemu, but OpenSource. It works by Client & Server system. Home: http://www.levelbot.org/
A self-guiding Flash front-end with a 100% Java-based XML parsing gateway that combines the look and functionality of a streaming game client with a background processing system for handling distributed data packages.
quake4j is a Java implementation of the original Quake engine. The game client can be launched from any web browser with one click, and lets you play deathmatch games with other quake4j users.
Last Online is a free and open-sourced MMORPG game. It consists in two main modules, a server and a client to play with. It is inspired by Ultima Online game but tries to implements a new gameplay and a better gaming experience.
Axis & Allies (a Milton Bradley game) is a board game with a strong following. However, as many of our lives become busier and we have less leisure time, it becomes increasingly difficult to schedule time for a good Axis & Allies Game.
GTADS is an open source multiplayer server and client suite to allow players of GTA1, GTA2, and other Lan based games to play each other in a convenient and efficient fashion.
Soviet Russia will be a risk game software written in Java 1.5 and initially it will use the standard Java API (J2SE 1.5).
Soviet Russia will count with a client for online engagement and maybe in future get a version web-based (Applet).
Mythwaves is a modular mud suite written in Java. It is composed of a server, a client, and a builder tool. Modularity allows you to create new modules and install them using the provided installer.
Open Hold em is a java-based, server and client environment for hosting your own texas hold poker tournaments, and regular tables. It is full customizable and deployable in a number of different java-based hosting environments.
The intention of the project is to develop a free MUD-Client, to make playing in huge MUD worlds more comfortable and generate nice graphical maps of the areas.
EmuLinker is a fully featured Kaillera network server. Kaillera is a client/server system that virtually any emulator can implement to enable network play, by mapping "Player 2" input to another user over the Internet using UDP network communication.