Repositories list

• Ultra

  Public
  A from-scratch kernel that aims to be (nearly) fully ABI compatible with the Linux kernel userland

  C

  •

  MIT License

  •11 fork in UltraOS/Ultra•3939 stars in UltraOS/Ultra•00 issues in UltraOS/Ultra•00 pull requests in UltraOS/Ultra•Updated Nov 12, 2026Nov 12, 2026

• BuildUtils

  Public
  Python utilities for building compiler toolchains & dependency handling

  Python

  •

  MIT License

  •00 forks in UltraOS/BuildUtils•33 stars in UltraOS/BuildUtils•00 issues in UltraOS/BuildUtils•00 pull requests in UltraOS/BuildUtils•Updated Nov 11, 2026Nov 11, 2026

• ImageUtils

  Public
  Python utilities for generating bootable disk images & related helpers

  Python

  •

  MIT License

  •00 forks in UltraOS/ImageUtils•00 stars in UltraOS/ImageUtils•00 issues in UltraOS/ImageUtils•00 pull requests in UltraOS/ImageUtils•Updated Oct 30, 2026Oct 30, 2026

• Kconfiglib

  Public
  UltraOS' fork of Kconfiglib

  Python

  •

  ISC License

  •2323 forks in UltraOS/Kconfiglib•00 stars in UltraOS/Kconfiglib•00 issues in UltraOS/Kconfiglib•00 pull requests in UltraOS/Kconfiglib•Updated Oct 30, 2026Oct 30, 2026

• Hyper

  Public
  A modern x86/ARM bootloader supporting both BIOS and UEFI

  pxe-bootx86-64x86+ 6

  pxe-bootx86-64x86uefibootloaderpxeaarch64efibios

  C

  •

  MIT License

  •22 forks in UltraOS/Hyper•8181 stars in UltraOS/Hyper•00 issues in UltraOS/Hyper•00 pull requests in UltraOS/Hyper•Updated Jul 17, 2026Jul 17, 2026

• UltraProtocol

  Public
  A generic boot protocol that doesn't require any special in-kernel sections.

  C

  •

  MIT License

  •00 forks in UltraOS/UltraProtocol•1313 stars in UltraOS/UltraProtocol•22 issues in UltraOS/UltraProtocol•00 pull requests in UltraOS/UltraProtocol•Updated Jul 10, 2026Jul 10, 2026

• VHC

  Public
  A utility that generates bootable virtual hard disks.

  C++

  •

  Apache License 2.0

  •00 forks in UltraOS/VHC•44 stars in UltraOS/VHC•00 issues in UltraOS/VHC•00 pull requests in UltraOS/VHC•Updated Feb 26, 2022Feb 26, 2022

• UltraLegacy

  Public archive
  An operating system that doesn't try to be UNIX. Made completely from scratch with its own bootloader. 😊 (Superseded by https://github.com/UltraOS/Ultra)

  multiprocessingosoperating-system+ 2

  multiprocessingosoperating-systemamd64i386

  C++

  •

  Apache License 2.0

  •11 fork in UltraOS/UltraLegacy•5353 stars in UltraOS/UltraLegacy•00 issues in UltraOS/UltraLegacy•00 pull requests in UltraOS/UltraLegacy•Updated Oct 29, 2021Oct 29, 2021

• doomgeneric

  Public
  Easily portable doom

  C

  •

  GNU General Public License v2.0

  •3.6k3.6k forks in UltraOS/doomgeneric•11 star in UltraOS/doomgeneric•00 issues in UltraOS/doomgeneric•00 pull requests in UltraOS/doomgeneric•Updated Aug 8, 2021Aug 8, 2021