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  • 1
    ChibiOS/RT free embedded RTOS
    ChibiOS/RT is a free and efficient RTOS designed for deeply embedded applications. It offers a comprehensive set of kernel primitives and supports many architectures: ARM7, Cortex-M0, Cortex-M3, Cortex-M4, PowerPC e200z, STM8, AVR, MSP430, ColdFire, H8S, x86.
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    Downloads: 588 This Week
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  • 2
    EmuTOS

    EmuTOS

    Free operating system for Atari computers, and more.

    EmuTOS is a TOS compatible operating system for Atari ST series computers, and more. It is made from Digital Research's GPLed original sources and is a free and open source alternative to Atari proprietary ROMs.
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    Downloads: 214 This Week
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  • 3

    SerpaeOS

    A cute and educational x86 OS

    SerpaeOS is a free, open-sourced x86 OS. It aims to provide a good resource for OSDevers to observe how certain features are implemented. The latest version is 23.2.1 Have a tip? Found a bug? Have a comment? Want to help? Contact us at serpaeos.devers@gmail.com Buy me a coffee! :) https://bmc.link/serpaeosdeL System Requirments: *4 GB Memory *4GB minimum PATA Hard Disk connected to the master slot on the primary IDE controller.
    Downloads: 0 This Week
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  • 4
    HelenOS

    HelenOS

    A microkernel-based multiserver operating system written from scratch.

    ...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: 1 This Week
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  • 5

    FPC DOS

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

    Downloads: 0 This Week
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  • 6

    Open Source on the Xbox 360

    UNIX/LINUX and legal homebrew software on the xbox360 gaming console

    An effort towards porting Linux and related open source operating systems to the Xbox 360. Another goal is to write homebrew applications with a legal and free Software Development Kit consisting of the Library (LibXenon) and the appropriate cross-compiler toolchain (Xenon-Toolchain). You can get informations and Source-Code on the following Pages: Wiki: http://www.free60.org Forum: http://www.libxenon.org Source Code: https://github.com/Free60Project
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    Downloads: 63 This Week
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  • 7
    Pharos

    Pharos

    RTOS for Secure, Safe and Real-Time Systems

    Pharos is a free open-source RTOS for secure, safe and real-time systems with the following characteristics: - Memory and enhanced time partitioning (TSP) - Native support for sporadic, periodic and aperiodic threads - Fixed-priority preemptive scheduler - Execution time protection (threads are prevented from executing for more time than they are configured to) - Small size (full image has ~100 to 300KiB text, ~30KiB data) - Hard real-time determinism - Fast critical sections - Prioritized nested interrupts - inter-partition communication with filters to protect unwanted access - Multicore support (RMP) - Supports ARM9, Cortex-A/R/M and Aarch64, RISC-V64 (64 bits) - The complete TestSuite (see below information) is run successfully for each platform in each release - Tested: more than 170 KLOC of requirement-based tests, executed for each board at each release - Up-to-date User Manual also available See our wiki page for more information.
    Downloads: 0 This Week
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  • 8

    BootDebug

    A Debug style tool for OS Free systems

    BootDebug is kind of an odd ball tool. It boots up like an OS (using Grub) but is not really an OS at all. What it provides is a tool to look at the system in a very pure state, allowing you to see exactly what is going on at they very start of the system powering up.
    Downloads: 0 This Week
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  • 9
    Fiwix

    Fiwix

    A UNIX-like kernel for the i386 architecture

    FiwixOS 3 is a Fiwix distribution, an operating system made from a software collection that is based upon the Fiwix kernel. It basically comprises a Fiwix kernel, GNU tools, libraries and additional software. All the included software is free and open-source software made available both as compiled binaries and in source code form, which allows modifications to the original software. FiwixOS 3 uses the Newlib v3.1.0 as its C standard library, and the Ext2 as its primary file system. Fiwix is an operating system kernel written from scratch, based on the UNIX architecture and fully focused on being POSIX compatible. ...
    Downloads: 0 This Week
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  • 10

    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.
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    Downloads: 179 This Week
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  • 11
    FreeMiNT

    FreeMiNT

    FreeMiNT is a free alternative OS kernel for Atari systems & clones

    FreeMiNT provides the basis of a free TOS compatible replacement OS that can multitask. Used together with the free system components fVDI (device drivers), XaAES (graphical user interface widgets), and TeraDesk (desktop manager), it provides a modern user interface.
    Downloads: 0 This Week
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  • 12

    fVDI

    Fenix/Free/Fast VDI

    Downloads: 0 This Week
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  • 13
    FROST operating system
    NOTICE: This project has been moved to https://github.com/thrimbor/frost The sourceforge project will not get updated anymore! FROST is a free operating system written in FreeBASIC and Assembly with the goal to create a small and stable system. It uses GRUB 2 as its bootloader.
    Downloads: 0 This Week
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  • 14

    ToddlerOS

    A Practical Lock-Free General Purpose Operating System

    The Toddler Operating System is the world's first practical lock-free general purpose operating system
    Downloads: 0 This Week
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  • 15
    Tarbox OS

    Tarbox OS

    Tarbox OS is a minimalistic 16 bit OS being developed in x86 Assembly.

    Tarbox OS is a minimalistic 16 bit operating sytem being developed by Brandan Tarbox as a school project, for the x86 processor architecture. It will be capable of manipulating files, running BASIC programs and several other simple OS functionalities. I appreciate you checking out Tarbox OS and appreciate any feedback to tarboxbrandan@hughes.net!
    Downloads: 0 This Week
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  • 16
    HelloOS is a simple free operating system for i386
    Downloads: 0 This Week
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  • 17
    Haiku is an open-source operating system currently in development designed from the ground up for desktop computing. Inspired by the BeOS, Haiku aims to provide a computing experience that is simple yet powerful, and free of any unnecessary complexities.
    Downloads: 0 This Week
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  • 18
    SOPA is an hobby opensource operating system written in both C and Assembly. The first purpose of this project is for me to learn and hopefully help other when learning about OS development. Feel free to contribute!
    Downloads: 0 This Week
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  • 19
    BNL OS
    BNL OS is a free, modern operating system based on the design of Windows XP/2003.This is not a Linux based system, and shares none of the unix architecture. Please remember, this is in the development stage, and is not reccommended for everyday use.
    Downloads: 0 This Week
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  • 20
    LoseThos, a free, 64-bit, multicore, PC operating system designed from scratch -- not a Unix. No bloat. Boots in 2 seconds. Comes with games, C compiler, tools and lots of demos of the API! Test-drive or install -- it is a live CD.
    Downloads: 0 This Week
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  • 21
    The Pigeon Mouette BSD project provides a FREE, multi-platform BSD UNIX-like operating system.
    Downloads: 0 This Week
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  • 22
    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
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  • 23
    AsARTOS
    Free and simply RTOS for AVR at assembler. So far, the AVR Studio is used as a development environment. The system supports the preemptive and cooperative multitasking modes, semaphores. Use a small amount of memory for tasks.
    Downloads: 0 This Week
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  • 24
    The objectives of OCERA is the design and implementation of a library of free software components for the design of embedded real-time systems. These components will be used to create flexible, configurable, robust and portable embedded applications.
    Downloads: 0 This Week
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  • 25
    ArchOpen is a project aimed at providing a fast, light and free operating system and applications for portable multimedia devices based on TI DM&DSC chips. It currently supports a lot of Archos multimedia devices (Gmini402,AV400,...).
    Downloads: 0 This Week
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