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  • 1
    ReactOS

    ReactOS

    An operating system based on the best Windows NT design principles

    ReactOS is an open source effort to develop a quality operating system that is compatible with applications and drivers written for the Microsoft Windows NT family of operating systems (NT4, 2000, XP, 2003).
    Leader badge
    Downloads: 5,065 This Week
    Last Update:
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  • 2

    FPC DOS

    an MS-DOS compatible OS, written in Pascal and i8086 assembly

    Downloads: 0 This Week
    Last Update:
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  • 3
    The FreeDOS Project

    The FreeDOS Project

    FreeDOS is an open source DOS-compatible operating system

    FreeDOS is an open source DOS-compatible operating system that you can use to play classic DOS games, run legacy business software, or write new DOS programs. Any program that works on MS-DOS should also run on FreeDOS.
    Downloads: 37 This Week
    Last Update:
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  • 4
    System Abstraction Component Kit
    This is a collection of libraries contained : Shared memory allocation, configuration script processor, containers (trees, lists, queues, stacks), file system abstraction, network library, timers/threads, Image library, Display libraries, and more.
    Downloads: 0 This Week
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  • 5

    WFDOS

    A multiplatform, DOS-like operating system

    This project was started as an implementation of DOS for homebrew computers. Its design stresses simplicity, adaptability, and flexibility. The operating system is largely written in C, allowing it to more easily be ported to other targets. The initial implementation will be for the Intel 8086; however, there are plans to port it to architectures based on the Z80, ARM, and amd64 as well.
    Downloads: 0 This Week
    Last Update:
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  • 6
    Merge the Solaris downstream version of GRUB legacy GPL source code into GRUB4DOS
    Downloads: 0 This Week
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  • 7

    MiniTAK Operating System

    A small operating system, compatible with MS-DOS, written in assemly

    ...And now in 2014, I want to publish it to the world. This operating system supports FAT12 file system, and allow to run many MS-DOS applications.
    Downloads: 0 This Week
    Last Update:
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  • 8
    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: 0 This Week
    Last Update:
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  • 9

    ultrasystem

    an os for x86 computers based on mikeos

    this is an os for x86 computers it is based on a number of other operating systems. i will keep you updated right now just cleaning up code.
    Downloads: 0 This Week
    Last Update:
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  • 10
    An operating system kernel designed with simplicity, readability, and elegance in mind. No longer written from scratch, but built on "the shoulder of giants." Specifics are given in the CREDITS file starting from v0.04
    Downloads: 0 This Week
    Last Update:
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  • 11
    Real-time, modular, microkernel-based operating system under development for i386. The first goal is to support 32-bit DOS protected mode applications made with DJGPP as well as native applications.
    Downloads: 0 This Week
    Last Update:
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  • 12
    Pebble is a 32-bit operating sytem for IA-32 systems. It can run MS-DOS and DPMI compatible applications and will provide advanced features such as multitasking and paging. It will be a good platform to run old MS-DOS and embedded programs.
    Downloads: 0 This Week
    Last Update:
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  • 13
    FreeOS/1
    FreeOS/1 is a Free, Open Source, FreeDOS based Free and Open Source Alternative OS, with open source Microsoft Windows compatibility using HXDOSExtender KernelEx,and ReactOS source code. FreeOS/1 will include new technologies and will be easy to use
    Downloads: 0 This Week
    Last Update:
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  • 14
    Perix is a MS-DOS compatible program, capable of running without an underlining OS. It is written in Turbo Pascal and Assembly. All parts of system are distributed under terms of the GNU General Public License v2.
    Downloads: 0 This Week
    Last Update:
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  • 15
    JonOS is an open source 16 bit operating system written 100% in assembly.
    Downloads: 0 This Week
    Last Update:
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  • 16
    SuperWaba is a Virtual Machine for handhelds. Runs in PalmOS, Windows CE, Win32, and is fully emulated under JDK/browser. Supports Exceptions, has a complete set of UI controls (Palm/WinCE), double and long, grayscale/color, sockets/serial/IR/Bluetooth
    Downloads: 52 This Week
    Last Update:
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  • 17
    lg-ceroOS es un proyecto que intentara desarrollar un sistema operativo x86 con interfaz gráfica para uso libre, lo que se desea con este proyecto es crear un sistema operativo sencillo, pequeño, rápido y fácil de crear aplicaciones.
    Downloads: 0 This Week
    Last Update:
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  • 18

    NuDawn

    A new operating system for mobile, IOT, servers and desktops

    NuDawn started as an OS/2 emulation for WINE and now has new direction to be an open source operating system supporting legacy hardware that the OEM no longer supports. NuDawn is a green OS, hence keeping your electronics out of the landfill.
    Downloads: 0 This Week
    Last Update:
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  • 19
    Pascal Operating System, That will translate Freedos to Pascal --OSPine written in Turbo Pascal and NASM. I think now I will make all that useful before I release. Thank for Feedback (^_^)
    Downloads: 0 This Week
    Last Update:
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  • 20
    DOS/32 Advanced DOS Extender is a drop-in replacement for the DOS/4GW DOS Extender and compatibles. Being fast, small and flexible DOS/32A can be used in many environments, from embedded systems to DOS emulators, by both developers and end users alike.
    Leader badge
    Downloads: 31 This Week
    Last Update:
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  • 21
    mDriver is a utility to migrate binary device driver from Windows to Linux. It takes out the binary instruction and data from Windows driver (*.sys files), and then combine them with some supporting code to build a corresponding Linux driver module.
    Downloads: 0 This Week
    Last Update:
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  • 22
    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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  • 23
    The FDOS Operaing System is 100% written in Assembler (NASM). It supports FAT 12, TSR and a small Multi Kernel System. The source is very good documentated (only in English). A German, russian and English Documentation (about 40 pages) are included.
    Leader badge
    Downloads: 1 This Week
    Last Update:
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  • 24
    A microkernel operating system distribution offering (among other things) very low hardware requirements, full and easy portability and easy-readable source code.
    Downloads: 0 This Week
    Last Update:
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  • 25
    An easy to use Development Environment for OS developers to design, write, compile, test, and publish new or existing OS projects with ease.
    Downloads: 16 This Week
    Last Update:
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