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Top 23 operating-system Open-Source Projects
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OpenFang is an operating system for autonomous agents. Not a framework. Not a wrapper. An actual OS, written from scratch in Rust by RightNow AI. 137,728 lines of code across 14 crates. Compiles to a single 32MB binary with zero external dependencies. This is not something someone cobbled together over a weekend.
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The-Complete-FAANG-Preparation
Dive into this repository, a comprehensive resource covering Data Structures, Algorithms, 450 DSA by Love Babbar, Striver DSA sheet, Apna College DSA Sheet, and FAANG Questions! 🚀 That's not all! We've got Technical Subjects like Operating Systems, DBMS, SQL, Computer Networks, and Object-Oriented Programming, all waiting for you.
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Anyone have any idea when Bottle rocket will acknowledge CVE? https://github.com/bottlerocket-os/bottlerocket/security/adv...
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bazzite
Bazzite makes gaming and everyday use smoother and simpler across desktop PCs, handhelds, tablets, and home theater PCs.
Project mention: Fedora is now the default Linux recommendation, and Ubuntu did this to itself | news.ycombinator.com | 2026-05-06 -
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Project mention: Aurora OS.js : I built a web-tech OS. It’s kinda an OS. Fine... it’s a hacking game. | dev.to | 2026-02-15
When I discovered OS.js back in 2020, a thought clicked instantly:
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ravynos
An open-source OS project that aims to provide source and binary compatibility with macOS® and a similar user experience.
Project mention: New OS aims to provide (some) compatibility with macOS | news.ycombinator.com | 2025-11-20 -
You might be using a device powered by Tock OS.
https://www.tockos.org/
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build
The official build framework for the Armbian Linux distribution. This repository contains the complete toolchain and scripts required to compile custom OS images from source, including kernel configuration, U-Boot handling, and board-specific tweaks for various ARM and ARM64 single-board computers.
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unikraft
A next-generation cloud native kernel designed to unlock best-in-class performance, security primitives and efficiency savings.
I've been using unikraft (https://unikraft.org/) unikernels for a while and the startup times are quite impressive (easily sub-second for our Rust application).
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Project mention: Moss: a Rust Linux-compatible kernel in 26,000 lines of code | news.ycombinator.com | 2025-11-21
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maestro
Lightweight, Linux-compatible kernel, written in Rust to leverage the safety of the typesystem. Aiming to remove as much legacy as possible while supporting most usecases (by maestro-os)
Project mention: Lightweight Linux-compatible kernel written in Rust | news.ycombinator.com | 2025-11-25
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
operating-system discussion
operating-system related posts
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Pluto – An x86 (Ring 0, Protected Mode) kernel written in Zig
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FatGid: FreeBSD 14.x kernel local privilege escalation
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ReactOS
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Line educational operating system released by Cornell University
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Hand Drawn QR Codes
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Copy Fail – CVE-2026-31431
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Is possible a language easy as py, fast as C, more secure than Rust?
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A note from our sponsor - SaaSHub
www.saashub.com | 7 Jun 2026
Index
What are some of the best open-source operating-system projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | puter | 42,126 |
| 2 | serenity | 33,323 |
| 3 | openfang | 17,734 |
| 4 | reactos | 17,604 |
| 5 | blog_os | 17,501 |
| 6 | redox | 16,365 |
| 7 | rust-raspberrypi-OS-tutorials | 14,651 |
| 8 | raspberry-pi-os | 13,782 |
| 9 | os01 | 13,478 |
| 10 | The-Complete-FAANG-Preparation | 11,957 |
| 11 | bottlerocket | 9,617 |
| 12 | bazzite | 8,553 |
| 13 | NodeOS | 7,339 |
| 14 | OS.js | 7,065 |
| 15 | ravynos | 6,720 |
| 16 | tock | 6,332 |
| 17 | build | 5,268 |
| 18 | IncludeOS | 5,238 |
| 19 | oshi | 5,229 |
| 20 | unikraft | 3,668 |
| 21 | lk | 3,642 |
| 22 | kerla | 3,464 |
| 23 | maestro | 3,242 |
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