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

  • Orchestrate Your AI Agents with Zenflow Icon
    Orchestrate Your AI Agents with Zenflow

    The multi-agent workflow engine for modern teams. Zenflow executes coding, testing, and verification with deep repo awareness

    Zenflow orchestrates AI agents like a real engineering system. With parallel execution, spec-driven workflows, and deep multi-repo understanding, agents plan, implement, test, and verify end-to-end. Upgrade to AI workflows that work the way your team does.
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  • Auth0 for AI Agents now in GA Icon
    Auth0 for AI Agents now in GA

    Ready to implement AI with confidence (without sacrificing security)?

    Connect your AI agents to apps and data more securely, give users control over the actions AI agents can perform and the data they can access, and enable human confirmation for critical agent actions.
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  • 1
    ASAP - Another Slight Atari Player
    ASAP (Another Slight Atari Player) plays and converts 8-bit Atari music (*.sap, *.cmc, *.mpt, *.rmt, *.tmc, ...) on modern computers and mobile devices.
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    Downloads: 166 This Week
    Last Update:
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  • 2
    Apple Disk Transfer ProDOS

    Apple Disk Transfer ProDOS

    Transfer disks and disk images between the Apple II and the real world

    Apple Disk Transfer ProDOS (ADTPro) transfers classic 8-bit Apple disk images over a serial, ethernet or audio link to a more modern computer. Based on the seminal ADT, ADTPro can transfer any ProDOS- or SOS-visible volume.
    Downloads: 38 This Week
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  • 3
    z390 Portable Mainframe Assembler

    z390 Portable Mainframe Assembler

    z390 Portable Mainframe Assembler and Emulator

    z390 Portable Mainframe Assembler and Emulator
    Downloads: 23 This Week
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  • 4
    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: 14 This Week
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  • Grafana: The open and composable observability platform Icon
    Grafana: The open and composable observability platform

    Faster answers, predictable costs, and no lock-in built by the team helping to make observability accessible to anyone.

    Grafana is the open source analytics & monitoring solution for every database.
    Learn More
  • 5
    GameBoid

    GameBoid

    Gameboy Advance emulator for Android phones

    This project is based on sources published by original GameBoid developer, who in turn used code of gpSP2X, based on gpSP. Help and suggestions are welcome. This project is abandoned in favor of RetroArch: http://www.libretro.com/. Seriously, check that one out!
    Downloads: 32 This Week
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  • 6
    JNode is a Java New Operating system Design Effort. JNode is a simple to use and install Java operating system for personal use on modern devices. Any java application runs on it, fast and safe. See our homepage for additional information.
    Downloads: 9 This Week
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  • 7
    Cambridge Z88

    Cambridge Z88

    Software development for 4Mb portable, using Z80 CPU and AA batteries

    This project is for the portable computer "Cambridge Z88", produced by Sir Clive Sinclair (of ZX Spectrum fame). We continue to support software development (ROM, 3rd party apps on memory cards and desktop applications). We have moved to https://cambridgez88.jira.com/wiki (development, source code and documentation). However, we continue to publish files for download here.
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    Downloads: 10 This Week
    Last Update:
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  • 8
    GBCoid

    GBCoid

    Gameboy and Gameboy Color emulator for Android phones

    This project is based on sources published by original GBCoid developer, who in turn used code of gnuboy. Help and suggestions are welcome. This project has been abandoned in favor of RetroArch, another awesome free software console emulator (which is also actively developed): http://www.libretro.com/.
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    Downloads: 5 This Week
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  • 9
    GNUDE is a complete suite of GNU C, C++, Fortran, and Java Cross Compilers, and the GDB CPU Simulator and Debugger for embedded microprocessor applications development. Targets development for ARM7, ARM9, and XScale applications.
    Downloads: 4 This Week
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  • Loan management software that makes it easy. Icon
    Loan management software that makes it easy.

    Ideal for lending professionals who are looking for a feature rich loan management system

    Bryt Software is ideal for lending professionals who are looking for a feature rich loan management system that is intuitive and easy to use. We are 100% cloud-based, software as a service. We believe in providing our customers with fair and honest pricing. Our monthly fees are based on your number of users and we have a minimal implementation charge.
    Learn More
  • 10
    JX is a flexible Java Operating System that can be customized for different execution environments. It provides separate protection domains for operating system components. Each protection domain may have its own execution environment.
    Downloads: 5 This Week
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  • 11
    Interlocking system for modular model railroading. The goal is the development of hard- and software for an model interlocking interfacing on the one hand to the model railroad and on the other to the model of the userinterface of an real interlocking.
    Downloads: 3 This Week
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  • 12
    JaguiD is a Java GUI for DOS. It consists of several sub-projects including a Java Compiler, a Class Runner and a Jar Packager. JaguiD has limited Java support to provide a Graphical User Interface for DOS and compatibles.
    Downloads: 2 This Week
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  • 13
    Apple Game Server 3.1

    Apple Game Server 3.1

    Upload games to legacy apple // computers via serial and no floppies!

    This java (version 6 or higher) program allows you to send games directly to an old apple // computer with no need for floppies, only a serial cable. No hardware modification is necessary, you only need a working serial connection. A cousin of this project can be found here: http://asciiexpress.net/gameserver/ (Thanks Egan!)
    Downloads: 1 This Week
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  • 14
    A Java 2 (JDK 1.3/1.4) compatible virtual machine. joeq is unique in that it is almost entirely implemented in Java, making it reliable and efficient. It is also language-independent, so code from any language can be seamlessly and dynamically compiled.
    Downloads: 1 This Week
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  • 15
    DefendLine
    Low-cost, easy to replicate GSM-based remote controlled security system capable of taking and sending pictures of a guarded site.
    Downloads: 1 This Week
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  • 16
    Mario is a Nintendo® GameBoy emulator for PalmOS, Java, Java Micro Edition (J2ME), Microsoft Windows, Mac OS X, Linux, and POSIX platforms.
    Downloads: 1 This Week
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  • 17
    A 6502 emulator for the 21st century. Initial development will be in C, but may lead to a portable Java implementation with graphical display.
    Downloads: 1 This Week
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  • 18
    Linux/Windows Admin with interactive features to control Resources on a remote PC
    Downloads: 0 This Week
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  • 19

    Android on PXA270

    Android on PXA270

    Porting Android to Intel(Marvell) ARM XScale PXA270. A complete build system for embedded Linux and Android on PXA270. It was open source for anyone but no responsibility for any damage resulting from any usage of the software. Demo : http://www.youtube.com/watch?v=3Ine1k4Hzy8 http://www.youtube.com/watch?v=3Xp5zMPOI1c http://www.youtube.com/watch?v=lYzRSNuUsIw http://www.youtube.com/watch?v=1lmmld7LjGM http://www.youtube.com/watch?v=CNGhFmCwaxw Documents : http://sourceforge.net/projects/android-pxa270/files/BringUp_Android_on_PXA270.pdf http://sourceforge.net/projects/android-pxa270/files/Android_Porting_on_PXA270.pdf Checkout the source code : svn co https://android-pxa270.svn.sourceforge.net/svnroot/android-pxa270 android-pxa270 Project host : http://www.mask.org.tw Author : mask.chung@gmail.com Blog : http://www.mask.org.tw/blog Linkedin : http://www.linkedin.com/in/maskchung Donate: Paypal or http://www.mask.org.tw
    Downloads: 0 This Week
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  • 20
    Ataroid

    Ataroid

    Atari emulator for Android phones

    This project is based on sources published by original Ataroid developer, who in turn used code of Stella. This project is abandoned in favor of Droid2600: https://code.google.com/p/droid2600/. Available sources do not compile into anything working anyway.
    Downloads: 0 This Week
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  • 21
    It moves by itself inside networks like virus infection & plagues, it is being written to solve computer virus problem drastically and responsibly. It is legal, free and open for public domain to improve W3 ICT Security.
    Downloads: 0 This Week
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  • 22
    Black scalpel is an advanced graphical (Swing gui) security and analysis tool written in Java, C and Assembler (platform independent). Current stage is early alpha, many features are still missing. Use SVN!
    Downloads: 0 This Week
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  • 23
    A new 64-bit RISC platform, complemented by a set of development tools, standards specifications and synthesizable VHDL implementations.
    Downloads: 0 This Week
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  • 24
    Code Red Sim

    Code Red Sim

    A low-power ISA design and simulator for a 2010 IEEE competition

    This is a student project designed to compete in the 2010 IEEE Computer Society Student Competition: http://www.computer.org/portal/web/competition/2010competition The Code Red architecture is designed for extremely lower power environments, like distributed sensor networks. Included is a design of that architecture, a Java-based simulator, an implementation (without vector instructions) designed as a Logisim circuit (http://ozark.hendrix.edu/~burch/logisim/), and more. The name "Code Red" comes from our team name, the Red Team. Since the competition dictated a small team size, our professor split the class and gave each group a color. We liked the name "Code Red" and chose it to represent our team and school's color (UMass' official color is Maroon.) Only later did we realize that "Code Red" was the name of an unrelated computer worm from 2001.
    Downloads: 0 This Week
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  • 25
    I finally got around to actually coding something! This is going to be an OS for use on combat robots, complete with full support for sensors, hammers, flamethrowers, wedges, saws, and clamper robots. All weapon systems are fully customizable w/RC.
    Downloads: 0 This Week
    Last Update:
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