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@osfree-project

osFree project

The open source OS/2 successor

Hi there 👋

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osFree is a Free Open Source software operating system development project, aiming to replace eventually all OS/2 subsystems with Open source analogues. It aims for OS/2 Warp 4 (Merlin) as a base compatibility system, which does not mean that we will not support features of newer (OS/2 Warp Server for e-business, eComStation and ArcaOS) OS/2 versions. This includes rewriting not only user-level code but the OS/2 kernel too.

Getting started

It is, first of all, development project. So, you need to download and configure build environment first. Read http://osfree.org/doku/en:develop:guidelines for more information.

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  1. osfree osfree Public

    osFree - open source Operating System/2 clone, usermode parts.

    C 150 13

  2. FreeLdr FreeLdr Public

    FreeLDR - highly configurable boot loader

    C 6 1

  3. DOS DOS Public

    DOS Personality

    C 10

  4. FamilyAPI FamilyAPI Public

    Shared API for DOS and OS/2 to produce dual mode applications

    Assembly 1

  5. WIN16 WIN16 Public

    osFree Janus: Open-Source Windows 3.0 Clone

    C 56 4

  6. doskrnl doskrnl Public

    Forked from FDOS/kernel

    Modified FreeDOS kernel - implements DOSKRNL for osFree MVM

    C 2

Repositories

Showing 10 of 44 repositories
  • osfree Public

    osFree - open source Operating System/2 clone, usermode parts.

    osfree-project/osfree's past year of commit activity
    C 150 13 15 0 Updated Sep 24, 2026
  • DOS Public

    DOS Personality

    osfree-project/DOS's past year of commit activity
    C 10 0 7 0 Updated Sep 17, 2026
  • FamilyApp Public

    Family applications suitable to run under both DOS and OS/2

    osfree-project/FamilyApp's past year of commit activity
    C 2 0 9 0 Updated Sep 17, 2026
  • FamilyAPI Public

    Shared API for DOS and OS/2 to produce dual mode applications

    osfree-project/FamilyAPI's past year of commit activity
    Assembly 1 0 4 0 Updated Sep 17, 2026
  • FreeLdr Public

    FreeLDR - highly configurable boot loader

    osfree-project/FreeLdr's past year of commit activity
    C 6 1 4 0 Updated Sep 16, 2026
  • WIN16 Public

    osFree Janus: Open-Source Windows 3.0 Clone

    osfree-project/WIN16's past year of commit activity
    C 56 4 18 0 Updated Sep 15, 2026
  • expand Public

    MS EXPAND.EXE clone

    osfree-project/expand's past year of commit activity
    C 3 LGPL-2.1 0 1 0 Updated Sep 15, 2026
  • fastopen Public

    FASTOPEN DOS TSR

    osfree-project/fastopen's past year of commit activity
    Batchfile 1 MIT 0 0 0 Updated Sep 15, 2026
  • UNI Public
    osfree-project/UNI's past year of commit activity
    Pascal 1 0 1 0 Updated Sep 15, 2026
  • winver Public

    Windows 3.x winver clone

    osfree-project/winver's past year of commit activity
    C 6 LGPL-2.1 0 3 0 Updated Sep 8, 2026