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~Drew DeVault/Helios

An experimental microkernel inspired by seL4 for the Ares Operating System.
microkernel capabilities
2 upvotes May 21, 2025

~Drew DeVault/Bunnix

A simple monolithic, single-user, Unix-like operating system. The project goal was to see how much can be done in the span of a month to recreate a Unix clone.
monolithic unix
2 upvotes May 21, 2025

~Terry Davis/TempleOS

A biblical-themed 64-bit operating system designed to be the Third Temple prophesized in the Bible, developed by Terry Davis alone over the course of a decade after a series of manic episodes that he described as a revelation from God.
Biblical Self-hosted Ring-0
2 upvotes May 21, 2025

~nakst/Essence

An operating system in development since ~June 2017, intended to replace Linux and Windows as a desktop operating system.
GUI Non-Unix Posix Subsystem
2 upvotes May 19, 2025

~iProgramMC/NanoShellOS

A preemptively multi-tasked 32-bit operating system with a windowed GUI.
Retro GUI x86
2 upvotes May 19, 2025

~DcraftBg/MinOS

A mini operating system written in C. (Minos is also the king of Crete in the greek mythology)
Non-Unix
1 upvotes Jun 8, 2025

~llenotre/Maestro

A lightweight Unix-like kernel written in Rust, its goal is to provide a lightweight operating system able to use the safety features of the Rust language to be reliable.
Unix-like Rust
1 upvotes Jun 7, 2025

~AptRock327/RaidouOS

A 64-bit multitasking operating system, It handles mouse and keyboard input, has a round robin scheduler, uses double-buffering, has a simple windowing system with window movement, has a custom handwritten font, a VFS, multithreading, a brainfuck interpreter, LZW decompressor, a text editor and does a bunch of other things.
GUI ring-0
1 upvotes Jun 7, 2025

~UnmappedStack/TacOS

A UNIX-like kernel which is able to run DOOM, among various other smaller userspace programs. It has things like a VFS, scheduler, TempFS, devices, context switching, virtual memory management, physical page frame allocation, and a port of Doom. It runs both on real hardware (tested on my laptop) and in the Qemu emulator.
Unix-like
1 upvotes Jun 6, 2025

~Jeremy Soller/RedoxOS

A Unix-like general-purpose microkernel-based operating system written in Rust, aiming to bring the innovations of Rust to a modern microkernel, a full set of programs and be a complete alternative to Linux and BSD.
Microkernel
1 upvotes Jun 5, 2025

~Anhad Singh/Aero

A new modern, experimental, UNIX-like operating system following the monolithic kernel design. Supporting modern PC features such as long mode, 5-level paging, and SMP (multicore), to name a few.
Unix-like
1 upvotes Jun 5, 2025

~cppLover0/Orange

A Unix-like x86_64 OS. It currently has bash, coreutils, lua and fastfetch ports
Unix-like
1 upvotes Jun 3, 2025

~marv7000/Menix

A modular 64-bit kernel written in Rust. Its goal is to provide a familiar POSIX/Linux-like user interface, with an easy to follow code structure and an emphasis on stable operation.
Modular
1 upvotes Jun 3, 2025

~safiworks/SafaOS

An open-source non-Unix-like OS, written from scratch in Rust for fun.
Non-Unix
1 upvotes Jun 3, 2025

~BlueSillyDragon/SnowOS

A microkernel-based hobby operating system built from scratch in C++ targeted at the x86 architecture.
Microkernel
1 upvotes Jun 3, 2025

~ozkl/soso

A simple Unix-like operating system written in Nasm assembly and mostly in C. It supports multiboot, so it is started by Grub. It can be built using Nasm and Clang. Tested build environments are Linux, FreeBSD.
Unix GUI
1 upvotes Jun 1, 2025

~p-durlej/VanadiumOS

A multi-user Unix-like OS. i386, amd64. Fully protected mode. Memory, file and hardware protection. root and unprivileged users. GUI without X, modular kernel, and has a live floppy image with a single user mode!
Unix single-user GUI
1 upvotes Jun 1, 2025

~Vlang/Vinix

An effort to write a modern, fast, and useful operating system in the V programming language.
Unix
1 upvotes Jun 1, 2025

~Sleepy Monax/skiftOS

A hobby operating system built from scratch using contemporary C and C++ for ARM, x86, and RISC-V architectures. It is designed to be simple, modern, and modular. skiftOS features a modern C++ core library, modern reactive UI, and a capability-based microkernel for security and modularity.
Microkernel Capabilities GUI
1 upvotes May 24, 2025

~Dustin Van Tate Testa/Conway OS

An operating system that's just Conway's Game of Life
game minimal
1 upvotes May 22, 2025

~ry/fox32os

A multitasking operating system for fox32 fantasy computer architecture, its features include relocatable FXF binaries, cooperative multitasking, filesystem access, memory allocation, and window management.
Custom architecture Cooperative multitasking GUI Retro
1 upvotes May 21, 2025

~NSG650/Polaris

Another UNIX-like kernel written in C, which uses Limine as its default bootloader and boot protocol. It's goal is to be simple to build and understand, while also acting as a learning experience.
Unix
1 upvotes May 21, 2025

~9front/9front

A fork of Plan 9. It was started to remedy a perceived lack of devoted development resources inside Bell Labs, and has accumulated various fixes and improvements.
Distributed
1 upvotes May 21, 2025

~Andreas Kling/SerenityOS

A love letter to '90s user interfaces with a custom Unix-like core. It flatters with sincerity by stealing beautiful ideas from various other systems.
Retro GUI Unix
1 upvotes May 21, 2025

~Mathewnd/Astral

A 64 bit operating system written in C which aims be compatible with POSIX. It has a growing support for networking and is able to run from disk with support for caching pages. Currently ported software ranges from Bash and GCC to X.org, Fvwm3, xterm and Quake.
POSIX Networking X.org
1 upvotes May 20, 2025

~Managarm/Managarm

A microkernel based operating system with asynchronous API for I/O and Linux userspace compatibility
Microkernel Asynchronous I/O Linux Compatibility
1 upvotes May 20, 2025

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