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

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  • 1
    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: 14 This Week
    Last Update:
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  • 2
    JMStella is a J2ME Atari 2600 VCS emulator based upon JStella 0.95. It allows one to play Atari 2600 games on a java-enabled mobile phone.
    4.8 out of 5 stars 5 Reviews
    Downloads: 3 This Week
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  • 3
    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: 12 This Week
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  • 4
    Rifidi is a middleware and development platform for RFID. With Rifidi you can prototype an RFID application down to the core RFID Hardware and using Rifidi Edge you can easily develop business rules to turn RFID events into real business applications.
    5.0 out of 5 stars 3 Reviews
    Downloads: 2 This Week
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  • 5
    Fx702p

    Fx702p

    A Casio Fx702p handheld-computer emulator

    A fully-featured Casio Fx702p emulator including the calculator mode, a full basic implementation and a original debugger as well as some sample programs.
    2.3 out of 5 stars 3 Reviews
    Downloads: 12 This Week
    Last Update:
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  • 6
    Compukit UK101 Simulation
    A simulation of a 1979 Compukit UK101 Personal Computer.
    5.0 out of 5 stars 2 Reviews
    Downloads: 2 This Week
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  • 7
    Test7
    Java multi emulator frontend with tiled thumbnails.
    5.0 out of 5 stars 2 Reviews
    Downloads: 2 This Week
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  • 8
    Dioscuri is an x86 computer hardware emulator written in Java. It is designed by the digital preservation community to make sure that documents and programs from the past can still be accessed in the future. Dioscuri is durable and component-based.
    5.0 out of 5 stars 1 Review
    Downloads: 3 This Week
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  • 9
    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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    5.0 out of 5 stars 1 Review
    Downloads: 3 This Week
    Last Update:
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  • 10
    BT-Sim is a BlueTooth simulator on a HCI level. The project alows to develop and test BT applications without using real BT hardware. It works in particular with PalmSource's Palm OS Simulator.
    Downloads: 5 This Week
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  • 11
    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!)
    5.0 out of 5 stars 1 Review
    Downloads: 2 This Week
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  • 12
    cp1-sim enables the user to simulate the famous KOSMOS CP1 educational computer from the 1980's on any PC or Mac. Give us some feedback! :)
    Downloads: 3 This Week
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  • 13
    Elliott 803 Simulation
    A simulation of the Elliott 803B computer from the 1960's.
    Downloads: 3 This Week
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  • 14
    JavaGear is a Sega Master System and Game Gear Emulator for Java. JavaGear runs as either an applet, embedded in a web page, or as a stand-alone application.
    Downloads: 3 This Week
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  • 15

    JavaQemu

    JavaQemu was my GUI Front End project for QEMU, written in Java.

    JavaQemu is a graphical frontend for QEMU, developed in Java. It was designed to simplify the use of QEMU on Windows systems, providing a user-friendly interface on top of the command-line tool. ## Status This project is currently **archived** and no longer under active development. ## Compatibility JavaQemu was originally built for: * Java Runtime Environment (JRE) 1.7 / 1.8 and newer * Microsoft Windows ## Future Direction A new version of this concept may be developed in the future, using more modern technologies and improved architecture. ## Notes This repository remains available for reference and historical purposes. Thank you for your interest. ## Help shape the future of JavaQEMU! If you'd like to see a new generation of JavaQEMU, please vote in the Patreon poll and let me know which features or priorities matter most to you. Patreon poll: https://www.patreon.com/DanielBruno/posts/which-project-to-160290802
    Downloads: 3 This Week
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  • 16
    WeirdX is a pure Java X Window System server.
    Downloads: 3 This Week
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  • 17
    openDLX

    openDLX

    A DLX/MIPS processor simulator

    openDLX is a DLX/MIPS ISA compatible pipeline simulator. (Visit https://github.com/smetzlaff/openDLX for the latest development version or if You want to contribute.)
    Downloads: 3 This Week
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  • 18
    Alchemy OS

    Alchemy OS

    Development and distribution platform for mobile phones

    Alchemy OS is a software development and distribution platform for mobile phones with Java support. Although this is not an operating system in the full sense, it provides rich platform to develop, compile and run applications directly in the phone, as well as install already written applications.
    Downloads: 2 This Week
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  • 19
    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.
    Downloads: 2 This Week
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  • 20
    SC/MP Processor Emulator

    SC/MP Processor Emulator

    Emulator of the ancient 8 bit microprocessor SC/MP 2

    Emulator of the ancient 8 bit microprocessor ISP-8A 500D/600D or more common "SC/MP" from National Semiconductor. The download contains all sources plus an executable Java Jar file to start right away. Some SC/MP hex dump examples are provided in directory "/etc" as well. The download also contains unit tests and some helping documentation (also in /etc). You may slow down the CPU operations, displaying the CPUs status register as LEDs, to watch the CPU working with its registers. The emulator also contains a VDU (video display unit) output / ASCII input simulation. There are some demos in /etc. And have a look to the NIBL / TINY BASIC interpreter in the TINYBASIC folder, most of the code is over 40 years old. Have fun, Theo Heinrichs
    Downloads: 2 This Week
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  • 21
    Microdigital TK2000 II Color Computer emulator.
    Downloads: 2 This Week
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  • 22
    VisualAp is a visual framework for building application and systems based on visual components. Users can add their own visual components in order to extend the capability of VisualAp. Tested with Windows XP, Vista, 7 and Ubuntu.
    Downloads: 2 This Week
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  • 23
    achtbit

    achtbit

    An 8 bit emulator created on the scratch, including an assembler.

    Ever had the experience of a 8 bit system, having max. 64k memory, using assembler to write effective small programs? This system is an experimental 8 bit, 16 color computer, with a processer similar to Z80, that (on my laptop using linux with NO opengl support) achieves up to 1.2 Million instructions per second and 50 Hz. screen refresh rate. It has a builtin assembler to load assembler programs. There is a rudimentary rom that implements some basic functions like line input, or a system clock. Also there is a snake game, (depending on that rom), as a reference and for fun! Take a look, give me your reply! When having ideas for better performance, let me know!
    Downloads: 2 This Week
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  • 24
    For new versions, check https://github.com/Darkkey/javaNetSim javaNetSim (Java Network Simulator) - it's a fork of a project jFirewallSim. The main goal of javaNetSim is creating a software to simulate various TCP/IP networks based on Ethernet, WiFi, PPP, etc...
    Downloads: 2 This Week
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  • 25

    jo2emLauncher

    portable o2em launcher

    jo2emLauncher stands for Java o2em launcher. It is a GUI to help people use o2em (the odyssey 2 / videopac emulator). Currently available launcher are only for windows. As jo2emLauncher is 100% java, it is able to run on a wide range of platforms. The first target is linux.
    Downloads: 2 This Week
    Last Update:
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