Best Open Source System Software 2026

System Software

System Windows OSI-Approved Open Source PlayStation Games Clear Filters

Browse free open source System software and projects for Windows and PlayStation below. Use the toggles on the left to filter open source System software by OS, license, language, programming language, and project status.

Gemini 3 and 200+ AI Models on One Platform
Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

Build generative AI apps with Vertex AI. Switch between models without switching platforms.

Start Free
Try Google Cloud Risk-Free With $300 in Credit
No hidden charges. No surprise bills. Cancel anytime.

Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.

Start Free
1

RetroArch

RetroArch is a frontend for emulators, game engines and media players.

RetroArch is a way to run classic games on a wide assortment of Operating Systems and Consoles. Support the Developers on their Patron! https://www.patreon.com/libretro

1 Review

Downloads: 33 This Week

Last Update: 2025-11-17
See Project
2

Yabause

Yabause is a portable Sega Saturn emulator.

18 Reviews

Downloads: 66 This Week

Last Update: 2015-07-31
See Project
3

PokeMini

Portable Pokémon Mini Emulator

Portable emulator for Pokémon-Mini. Last version: 0.60 (16 June 2015) Check Wiki for platform dependencies and other information.

Downloads: 23 This Week

Last Update: 2018-08-07
See Project
4

Sensa

Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..

Sensa is not an operating system, is a work environment compatible with Android © 4.4.4, Firefox OS ©, Linux Ubuntu 12.12 ©, MacOS Classic 7 ©, MS -DOS © operating systems, and Microsoft Windows 8.1 ©; whose distribution is free, and with source code available under GNU GPL 2.0 license .

Downloads: 1 This Week

Last Update: 2016-03-29
See Project
MongoDB Atlas runs apps anywhere
Deploy in 115+ regions with the modern database for every enterprise.

MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.

Start Free