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Browse free open source Java Games and projects below. Use the toggles on the left to filter open source Java Games by OS, license, language, programming language, and project status.

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  • 1
    XiangQi Wizard (Chinese Chess Wizard) is a powerful XiangQi (chinese chess) program, which supports UCCI engines. XQWizard Light is the Mobile version for Windows CE and Java ME. ElephantEye is the UCCI engine in XQWizard with strong AI.
    Downloads: 28 This Week
    Last Update:
    See Project
  • 2
    Ares
    Ares stands for Aural RPG Experience System. It is used to create and play music lists, background sounds or special sound effects for different situations during (pen & paper) role-playing.
    Downloads: 23 This Week
    Last Update:
    See Project
  • 3
    RealTimeBattle is a programming game, in which robots controlled by programs are fighting each other. The goal is to destroy the enemies, using the radar to examine the environment and the cannon to shoot.
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    Downloads: 65 This Week
    Last Update:
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  • 4
    chessPDFBrowser

    chessPDFBrowser

    Chess application whichs allows working with chess PDF books and PGNs.

    Chess application which allows working with PDFs and PGNs. You can work with the chess games of the PDF and edit their tree of variants. Graphical environment. Standard PGN TAGs. PGN comments. Ocr like (Fen string detection from chess board position images). Connection to Uci chess engines (like stockfish). Position analysis, full game analysis. You can now play games against uci engines. pdf2pgn command line command included. Detailed documentation. Multilanguage currently support for English, Spanish and Catalan. Dark mode option. JDK-17 compatibility
    Downloads: 36 This Week
    Last Update:
    See Project
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  • 5
    Nesoid

    Nesoid

    NES emulator for Android phones

    This project is based on sources, published by original Nesoid developer, who in turn used code of GPFCE, forked from FCEUltra, currently incarnation of which is known as FCEUX. Help and suggestions are welcome. This project has been abandoned in favor of the RetroArch, another awesome free software emulator (which has much better NES support and is more actively developed): http://www.libretro.com/.
    Downloads: 22 This Week
    Last Update:
    See Project
  • 6
    JSoko

    JSoko

    The Sokoban game implemented in Java.

    JSoko is a Java program for playing the Sokoban game. It features path finding, auto push, auto solving, undo/redo, deadlock detection, and more.
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    Downloads: 14 This Week
    Last Update:
    See Project
  • 7
    Connect Joystick to PC

    Connect Joystick to PC

    Connect any joysticks to your PC. Easy, Fast and Free forever.

    ⚠️ This application language is Turkish, if you want to download English version click here https://sourceforge.net/projects/connect-console-to-pc/ You have got a controller but you can't connect it to the PC, this application will make it for you. You can connect your PlayStation 3, Playstation 4, Playstation 5 and more joysticks to your PC. ⚠️If Windows shows Unknown application error click "More Info" then click "Run Anyway".
    Downloads: 30 This Week
    Last Update:
    See Project
  • 8
    Rolemaster Office
    PC and NPC character generator for Rolemaster RMFRP roleplaying system (from Iron Crown Enterprises). The program calculates all bonus and generates a nice PDF character sheet that contains additionally pages. The programm does not provide during-game support.
    Downloads: 11 This Week
    Last Update:
    See Project
  • 9
    x3d

    x3d

    X3D is the open-standard format for 3D graphics scenes on the Web.

    Extensible 3D (X3D) Graphics is a royalty-free International Standard for real-time interactive 3D graphics on the Web, providing unsurpassed interoperability for 3D communications on the Web. This project includes source for example X3D scene libraries and multiple X3D codebases produced by Web3D Consortium members. All open-source contributions are welcome.
    Downloads: 19 This Week
    Last Update:
    See Project
  • Easy-to-Use Website Accessibility Widget Icon
    Easy-to-Use Website Accessibility Widget

    An accessibility solution for quick website accessibility improvement.

    All in One Accessibility is an AI based accessibility tool that helps organizations to enhance the accessibility and usability of websites quickly.
    Learn More
  • 10
    SpongeAPI

    SpongeAPI

    A Minecraft plugin API

    A mature Minecraft plugin API (not including an implementation), licensed under the MIT License. If you do not have Gradle installed then use ./gradlew for Unix systems or Git Bash and gradlew.bat for Windows systems in place of any 'gradle' command. Sponge will use a javac version of at least 11. If an older JDK is used to launch Gradle, JDK 11 will be downloaded automatically. SpongeAPI is the tool developers use to create plugins for the Sponge platform.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 11
    SpongeForge

    SpongeForge

    A Forge mod that implements SpongeAPI

    A Forge implementation of the Sponge API. SpongeForge uses Gradle as its build system. The repo includes the Gradle wrapper that will automatically download the correct Gradle version. Local installations of Gradle may work but are untested. To execute the Gradle wrapper, run the ./gradlew script on Unix systems or only gradlew on Windows systems. In order to build SpongeForge you simply need to run the gradlew command. On Windows systems you should run gradlew instead of ./gradlew to invoke the Gradle wrapper. SpongeForge is the implementation of the Sponge API on the Minecraft Forge platform. Recommended for running plugins together with Forge mods. The purpose of the Sponge project is to create a plugin development framework for Minecraft: Java Edition. Sponge is being created by a global community, and its open-source nature means anyone can participate.
    Downloads: 2 This Week
    Last Update:
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  • 12
    Tweaked

    Tweaked

    Just another ComputerCraft fork

    Tweaked is a mod for Minecraft that adds programmable computers, turtles and more to the game. A fork of the much-beloved ComputerCraft, it continues its legacy with improved performance and stability, along with a wealth of new features. Tweaked can be installed from CurseForge or Modrinth. It runs on both Minecraft Forge and Fabric.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 13
    CoffeeMud

    CoffeeMud

    Full featured MUD server with all the trimmings.

    CoffeeMud is a text-based virtual reality game engine (a MUD). It is a mature, full-featured Java codebase. It includes web (HTTP) and email (SMTP) servers, chat (IMC2 and I3) and web clients, and supports ANSI, MXP, and MSP.
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    Downloads: 11 This Week
    Last Update:
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  • 14
    Open Mahjong
    Implementation of the original Chinese board game of Mahjong using Hong Kong rules.
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    Downloads: 29 This Week
    Last Update:
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  • 15
    Free Mars

    Free Mars

    Turn based free strategy game about colonizing Mars.

    It is the year 2077, for the first time in its history mankind has finally began the colonization of another planet. Will the pioneers from Earth succeed in colonizing their new home or will they fail to survive against the harsh and inhospitable conditions of the Red planet? Free Mars is a turn based strategy game about colonizing Mars.
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    Downloads: 10 This Week
    Last Update:
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  • 16
    An entertaining Sokoban game with nice 3D graphics available for Windows, Linux & Mac. Features different skins & workers, several level sets, resume & replay, improved mouse/keyboard control, audio etc.
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    Downloads: 48 This Week
    Last Update:
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  • 17
    The Neverhood Restoration
    Be warned this project was discontinued in 2013 and has not been updated in years.
    Downloads: 48 This Week
    Last Update:
    See Project
  • 18
    Origami Editor 3D

    Origami Editor 3D

    Virtual paper folding program

    Origami Editor 3D is an advanced paper folding simulator. It uses a what-you-see-is-what-you-get interface and operates with a geometric abstraction of the Yoshizawa-Randlett system. Anything from a simple airplane to John Montroll's omega star can be folded in this editor. Origami files created with the program preserve the entire folding process, and they can be exported as folding diagrams in PDF, animated GIF files, or even as standalone Java programs displaying the origami in a 3D viewer when opened. The main purpose of this program is designing origami, but if you only want to learn how to make some origami figures, there is a set of built-in example files that can help you. Currently, there are 34 example figures available. Please note that this project was created for fun and still is a work in progress. The Discussion forum is open for anyone who wants to report a bug or suggest a new feature. User Guide: http://origamieditor3d.sourceforge.net/userguide/en/index.html
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    Downloads: 26 This Week
    Last Update:
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  • 19
    ContestOrg
    ContestOrg est un logiciel d'organisation de tournois. Celui-ci est particulièrement bien adapté aux tournois sportifs (football, judo, rugby...) mais peut également convenir pour d'autres types de tournois (jeux vidéo, jeux de société, robot
    Downloads: 24 This Week
    Last Update:
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  • 20
    SolitaireCG

    SolitaireCG

    Solitaire Card Games for Android™

    SolitaireCG is an adaptation of Ken Magic's "Solitaire" for devices with few hardware buttons. SolitaireCG stands for Solitaire Card Games and is a software application for Android™. Solitaire Card Games include Klondike (regular solitaire), Vegas, Spider, Golf, Freecell, Forty Thieves, TriPeaks, and variations of these games. Key changes against the original are outlined at: https://solitairecg.sourceforge.io/ The changes fix bugs, add games and portait mode, and enable card dealing and playability in spider. New hi-res graphics have been added to the original card graphics to take advantage of today's larger, higher resolution screens. Source code available under Apache license 2.0, see git repository.
    Downloads: 43 This Week
    Last Update:
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  • 21
    Connect Controller to PC

    Connect Controller to PC

    If you can't connect your controller to PC, this program will do it.

    Some Playstation DualShocks like 3,4 and 5 can't connect to PC but this program will change your controller to XBOX joystick and you can play games and control your pc with your controller. It is free and fast forever. Daily updates. ⚠️If Windows shows Unknown application error click "More Info" then click "Run Anyway".
    Downloads: 53 This Week
    Last Update:
    See Project
  • 22

    MegaMekLab

    Create meks and more!

    MegaMekLab is a Mek creator program. Currently it can create Meks, vehicles, battlearmor, and conventional infantry. It can also print PDF record sheets for almost all Battletech units. Created units can also be exported to formatted text or html for posting online.
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    Downloads: 15 This Week
    Last Update:
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  • 23
    SonOyuncu Makro 15+CPS

    SonOyuncu Makro 15+CPS

    Ücretsiz SonOyuncu macrosu, minimum 15CPS garantili.

    Bu program UfukGames tarafından yapılmıştır. Güvenli, hızlı ve az yer kaplar. SonOyuncu uygulamasının içine makro programımız konulmuştur. Oyun içinde eş zamanlı olarak açıp kapatabilirsiniz.
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    Downloads: 23 This Week
    Last Update:
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  • 24
    Utility for translating language packs used in games into a different language. Supports over 50 games, with more games added through small plugins. Simple and easy-to-use interface, and totally free.
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    Downloads: 41 This Week
    Last Update:
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  • 25
    jose is a graphical Chess tool. >>> moved to https://peteschaefer.github.io/jose <<< You can store chess games in a database. You can view and edit games (including variations and comments). You can play against a plugged-in chess engine and use it for analysis. Features 3D board view.
    Downloads: 17 This Week
    Last Update:
    See Project