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

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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: 4,366 This Week
    Last Update:
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  • 2

    Kernelloader

    Run Linux on the Playstation 2

    Kernelloader is a free bootloader for PS2 Linux and other Playstation 2 operating systems. Loading can be done by "Action Replay Media Player", by "memory card exploit", by "FMCB" or any other homebrew loading method. If you downloaded the latest Linux Live DVD, you need to run the online updater to be able to play Youtube videos.
    Leader badge
    Downloads: 105 This Week
    Last Update:
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  • 3
    Syllable Desktop is a complete operating system that is easy to use, powerful, lightweight and extraordinarily fast and responsive. It has its own kernel, filesystem, GUI and applications. Syllable Server is a matching small and efficient Linux server.
    Downloads: 23 This Week
    Last Update:
    See Project
  • 4
    Partition Logic

    Partition Logic

    Disk partitioning and data management for x86-compatible systems

    Based on the Visopsys operating system, Partition Logic is a bootable disk image featuring a disk manager program that can create, delete, erase, format, defragment, resize, copy, and move partitions and modify their attributes. It can copy entire hard disks from one to another. Other tools, such as system diagnostics, are also available within the system.
    Leader badge
    Downloads: 42 This Week
    Last Update:
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  • 5
    NuttX

    NuttX

    Real-Time Embedded Operating System

    Nuttx is a real time embedded operating system (RTOS). Its goals are: (1) small footprint usable in deeply embedded, resource constrained environments, (2) fully scalable from tiny (8-bit) to moderate (32-bit), (3) standards compliance, (4) real time, and (5) totally open. Think "Tiny Linux". NuttX is now and Apache project in incubation. See https://nuttx.apache.org/download/ for the latest downloads.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 6
    operating system simple

    operating system simple

    Operating System Guide Dari 0

    operating_system_guide is a curated, beginner-friendly resource aimed at helping aspiring developers learn how to create an operating system from scratch. Maintained by AzkaDev, the guide collects educational materials, links, and code snippets that walk learners through each major component of OS development—from bootloaders to kernel structures and system calls. While still evolving, the guide acts as a roadmap and inspiration hub for those wanting to explore low-level systems programming with a hands-on approach.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    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: 7 This Week
    Last Update:
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  • 8

    The NitrOS-9 Project

    OS-9/6809 compatible operating system for Tandy CoCo and Dragon

    The NitrOS-9 Project provides an OS-9/6809 compatible operating system for the Tandy/TRS-80 Color Computer and Dragon home computer.
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    Downloads: 7 This Week
    Last Update:
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  • 9
    Haiku is an open-source operating system currently in development designed from the ground up for desktop computing.
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    Downloads: 6 This Week
    Last Update:
    See Project
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  • 10
    ELKS is a subset of the Linux kernel that runs on IBM compatible PCs from 8086 up. It is intended to get use out of obsolete old hardware, for use in embedded systems, and as an educational tool. ELKS has been moved to Github to protest SourceForge's installer adware hijacking. This does not directly affect ELKS, but it does affect many major open source projects such as Gimp and FileZilla by attempting to trick the user into installing adware in order to download these programs. I refuse to leave ELKS here with such policies in effect. If you have questions about this, please email jody@c02ware.com.
    Downloads: 2 This Week
    Last Update:
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  • 11
    HelenOS

    HelenOS

    A microkernel-based multiserver operating system written from scratch.

    HelenOS is a portable microkernel-based multiserver operating system written from scratch. It decomposes key operating system functionality such as file systems, networking, device drivers and graphical user interface into a collection of fine-grained user space components that interact with each other via message passing. A failure or crash of one component does not directly harm others. HelenOS is therefore flexible, modular, extensible, fault tolerant and easy to understand. HelenOS does not aim to be a clone of any existing operating system and trades compatibility with legacy APIs for cleaner design. Most of HelenOS components have been made to order specifically for HelenOS so that its essential parts can stay free of adaptation layers, glue code, franken-components and the maintenance burden incurred by them.
    Downloads: 7 This Week
    Last Update:
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  • 12
    Visopsys

    Visopsys

    Alternative operating system for x86 computers

    Visopsys is an alternative operating system for PC compatible computers. In development since 1997, this system is small, fast, and open source. It features a simple but functional graphical interface, pre-emptive multitasking, and virtual memory. Though it attempts to be compatible in a number of ways, Visopsys is not a clone of any other operating system. You can demo the distribution from a “live” CD/DVD or floppy disk
    Downloads: 6 This Week
    Last Update:
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  • 13
    ManuOS

    ManuOS

    My own operating system.

    Currently ManuOS kernel is under development. Once kernel is complete, a good Graphical User Interface will be developed for ManuOS. ManuOS runs on IA-32, x86-64 and currently operates in protected mode. In future ManuOS is intended to run in long mode.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 14
    PlusOS (Plus Operating System)

    PlusOS (Plus Operating System)

    OS bootable from Linux,Windows and others partitions as auxiliary OS

    Plus operating system is hobby project. That's built to run as auxiliary OS with Major OS like Windows and Linux etc..bootable with grub2 and own boot loader.focused on eBook reading software(PDF,EPUB,MOBI,DJVU,CHM...).with programs like calculator, notepad,source code editor, hex viewer, text viewer,image viewer and many games.VESA 32bpp GUI from startup.read-only plus maybe writing support for standard file systems FAT/NTFS/EXT/CDFS.codec for archives(ZIP,RAR,7z,GZ ...).codec for image formats(JPG,BMP,GIF,PNG...).video player or at least thumbnails extract(AVI,MKV,MP4,3GP...). mountable as filesystem from ISO,ISZ file.generic drivers VBE,USB,HD Audio,Keyboard, mouse.bootable on qemu and of course on real computer systems.at least all drivers for one computer (my) this is primary goal. In summary goal is building a stable and usefull OS. A Project By Arshad Latti. Support PlusOS project on patreon https://www.patreon.com/arshadlatti to encourage.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 15
    AquariusOS

    AquariusOS

    An open source OS written in assembly.

    An open source OS. It is 32-Bit and when possible 64 and 128-Bit. We are working on a complete rewrite. After which we will work on our UI. ATTENTION!: After AquariusOS 0.0.4 AquariusOS will be based off of aqua-next. 0.0.5 with an aqua-next base will hopefully be released BEFORE 2016.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 16
    BaltaOS
    BaltaOS: Uno de los OS más conocidos en Argentina. También uno de los OS más intuitivos para el usuario. Hecho en: Argentina, Santa Fe - Piso 1 Saavedra y chacabuco al 1827 Un pequeño grupo de persnas para el desarrolo del mismo.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 17
    GTCop Professional Security Appliance aims to provide a powerful tool for satellite communications, with enhanced QoS and bandwidth controls. As derived from IPCop Firewall, it is a stable, secure, easy to configure and maintain GNU/Linux firewall box.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 18
    uDOS is a free operating system built on the FreeDOS kernel with DJGPP. uDOS provides an integrated suite of features inluding Perl, Python, etc., as well as a Watt-32 based networking environment and ELF library support. Can be run live from CD image.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 19

    EXIRION/OS

    Embedded Operating System

    EXIRION/OS is an operating system for embedded computer systems. These operating systems are designed to be compact, efficient at resource usage, and reliable, forsaking many functions that non-embedded computer operating systems provide, and which may not be used by the specialized applications they run. They are frequently also referred to as real-time operating systems, and the term RTOS is often used as a synonym for embedded operating system. EXIRION/OS project, a Open operating system for computers that can be used in specific operations that require execute a task at a time, EXIRION/OS operating system is a monolithic and mono layered task, which can be used to control complex electronic equipment without the use of instruments PLC, offering a wide range of electronic and industrial applications, EXIRION/OS is also an educational tool, it is an open source operating system to use it as an example of building operating systems in universities and technical colleges.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 20
    It is a simple operating system that i write in my spare time. It is not the best design and it is buggy but i hope it will get better.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    HackShark Linux

    HackShark Linux

    Lightweight Linux distro for penetration testing

    Based on MATE environment HackShark Linux is a lightweight distribution for penetration testing, cyber forensic investigation and vulnerability assessment purpose.
    Downloads: 1 This Week
    Last Update:
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  • 22
    Infortus is a hobby OS. It's written in C and Assembly.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 23

    WinLynx

    A Linux Operating System based off of openSUSE

    WinLynx is a simple-to-use Linux Operating system based off of openSUSE. Using the KDE4 Desktop Environment makes the GUI look sharp and modern. WinLynx packages, LibreOffice, Mozilla FireFox, and much, much more.... NOTE: WinLynx comes with a default user which is "root". We RECOMMEND creating a new user for personal use. If, you want to use the default "root" user, the password is "linux"
    Downloads: 1 This Week
    Last Update:
    See Project
  • 24
    hackOS ist ein Betriebssystem, was ich in meiner Freizeit programmiere. Der Name hat nichts mit seiner funktionialität zu tun!
    Downloads: 1 This Week
    Last Update:
    See Project
  • 25
    a small, x86 Operating System, developed in C++ and NASM, aimed to give the user a closer relationship with the hardware.
    Downloads: 1 This Week
    Last Update:
    See Project
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