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

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  • eProcurement Software Icon
    eProcurement Software

    Enterprises and companies seeking a solution to manage all their procurement operations and processes

    eBuyerAssist by Eyvo is a cloud-based procurement solution designed for businesses of all sizes and industries. Fully modular and scalable, it streamlines the entire procurement lifecycle—from requisition to fulfillment. The platform includes powerful tools for strategic sourcing, supplier management, warehouse operations, and contract oversight. Additional modules cover purchase orders, approval workflows, inventory and asset management, customer orders, budget control, cost accounting, invoice matching, vendor credit checks, and risk analysis. eBuyerAssist centralizes all procurement functions into a single, easy-to-use system—improving visibility, control, and efficiency across your organization. Whether you're aiming to reduce costs, enhance compliance, or align procurement with broader business goals, eBuyerAssist helps you get there faster, smarter, and with measurable results.
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  • 1
    FTLEditor

    FTLEditor

    A tool to edit profile and saved game files for FasterThanLight.

    A 3rd-party tool to edit user files for the game FasterThanLight. With this, you can unlock any or all ships and achievements in your user profile, or tweak most aspects of saved games: crew, systems, weapons, fires, breaches, etc.
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    Downloads: 120 This Week
    Last Update:
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  • 2
    Biogenesis
    Biogenesis is an artificial life program that simulates the processes involved in the evolution of organisms. It shows colored segment based organisms that mutate and evolve in a 2D environment. Biogenesis is based on Primordial Life.
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    Downloads: 36 This Week
    Last Update:
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  • 3
    VASSAL Engine
    VASSAL is a game engine for creating electronic versions of traditional board and card games. It provides support for game piece rendering and interaction, and supports play by email or over a live connection.
    Downloads: 25 This Week
    Last Update:
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  • 4
    Corewar is a game played vicariously through the action of assembly language programs written in a language called Redcode. Corewar is discussed in the Usenet group REC.GAMES.COREWAR; the reference implementation of this game, pMARS, is maintained here.
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    Downloads: 30 This Week
    Last Update:
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  • D&B Hoovers is Your Sales Accelerator Icon
    D&B Hoovers is Your Sales Accelerator

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  • 5
    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.
    Downloads: 8 This Week
    Last Update:
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  • 6
    Kelpie Flight Planner for Flightgear
    The Kelpie Flight Planner for Flightgear. This Java based Gui flight planner uses the airport and navaid databases of the Flightgear, allowing the user to search for airports and navigation aids and plan flights between them. [Note: Requires Java 1.10 or above] This program is no longer being actively developed or supported. All future work is being undertaken on a port to Rust/Gtk at https://github.com/shartrec/kelpie-flight-planner. But is still in the very early stages.
    Downloads: 7 This Week
    Last Update:
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  • 7
    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: 8 This Week
    Last Update:
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  • 8
    XHSI - glass cockpit for X-Plane 10 & 11
    XHSI (eXternal High-resolution Simulator Instruments) is an add-on for the X-Plane flight simulator. It displays the PFD, ND, EICAS, Flaps and Gear indicator, Clock/Chronometer, etc... in separate windows. In general, the instruments can be displayed in B737-NG or A320 style.
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    Downloads: 16 This Week
    Last Update:
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  • 9
    Helping you rifle through other people's packages. The DBPF2 file format is used for most of the content in the Sims 3 engine. This project provides a Java-based API, and supporting GUI application, to unpack, browse, edit and repack these files.
    Downloads: 8 This Week
    Last Update:
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  • Top Corporate LMS for Training | Best Learning Management Software Icon
    Top Corporate LMS for Training | Best Learning Management Software

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  • 10
    A computer version of the World War 2 tactical boardgame "Squad Leader" originally published by The Avalon Hill Games Company. Play any scenario against anyone around the world!
    Downloads: 4 This Week
    Last Update:
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  • 11
    A PSP porting of SUN's phoneMEAdvanced project (https://phoneme.dev.java.net/), to enable MIDP/PBP/JavaME applications running on PSP. You can also find phoneMEFeature PSP porting from another project: pspkvm(https://sourceforge.net/projects/pspkvm)
    Downloads: 5 This Week
    Last Update:
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  • 12
    PolyJen: Polymerization in a digital laboratory
    Downloads: 5 This Week
    Last Update:
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  • 13
    MorseLab
    Java-based free software for learning audio and flashing-light Morse code. Features include very flexible audio system, drills based on live news feeds, and adaptive drilling strategies.
    Downloads: 4 This Week
    Last Update:
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  • 14
    ATCJ: Air Traffic Controller Game, let you direct flights into and out of the flight arena and airports, written in Java, small and portable, based on the classical UNIX terminal based Air Traffic Controller Game (atc) created by Ed James.
    Downloads: 2 This Week
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  • 15
    Simulation Laboratory
    Simulation Laboratory (SimuLab) is a free combat flight simulation designed with the maximum degree of modularity and customize-ability in mind.
    Downloads: 2 This Week
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  • 16
    An experiment in paired-programming to simulate elevator behaviour. Development is done entirely in Java. The finished product will provide a framework for additional simulations and some ability to test different elevator behaviours.
    Downloads: 3 This Week
    Last Update:
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  • 17
    Jagent
    Jagent is a suite for manipulating Creatures 3 and Docking Station agents. It consists of a sprite tool (Edos) and a PRAY tool (Monk). It requires Java (http://java.com/)
    Downloads: 3 This Week
    Last Update:
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  • 18
    A java applet for animating Ultimate plays
    Downloads: 2 This Week
    Last Update:
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  • 19

    Crazy DownHill

    Free open source game created in Unity 3d for Windows 64 bits

    This is a free car game created in unity 3d for Windows 64 bits. You can download and use all script code under CC Attribution-NonCommercial-ShareAlike 3.0 Unported License. All Crazy Downhill game files and setup file: Copyright © 2013 Jesús Martín Berlanga. All rights reserved. Script Code License: http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode CC Attribution-NonCommercial-ShareAlike 3.0 Unported
    Downloads: 1 This Week
    Last Update:
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  • 20
    This program allows user to test the roads to be constructed, on a three dimensional simulation environment.
    Downloads: 1 This Week
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  • 21
    CazaPool3D is a 100% java3d pool and billard game, with both single and multiple player abilities. It tracks ball paths, handle undo, use mulitple views, loads (threads) multiple 3ds objects, handles picking/collision/animation/overlays and more
    Downloads: 1 This Week
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  • 22
    A Java game based off the version on YoYoGames.com: http://gmc.yoyogames.com/index.php?showtopic=279075 The only controls are the arrow keys: Left and Right to steer, Up key to go faster.
    Downloads: 1 This Week
    Last Update:
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  • 23
    Massively Multiplayer Space Trading and Combat game. This is an online strategy game, not a 3D space sim. Incorporating ideas from games such as Stars!, SE3, MOO, Tradewars, MUD/MOOs, Dune II, SimCity.
    Downloads: 1 This Week
    Last Update:
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  • 24
    Intersection simulator

    Intersection simulator

    Application that simulates intersection traffic with input parameters.

    Traffic simulator is an application in which you input some parameters, like the length of each traffic light etc. , and then it shows you stats. I made this application as my last project on college.
    Downloads: 1 This Week
    Last Update:
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  • 25
    JAS is a java library for creating agent based simulations. It features a discrete-event time engine, APIs for network simulation design, powerful yet easy-to-use implementations of Genetic Algorithms and Neural Networks.
    Downloads: 1 This Week
    Last Update:
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