Browse free open source C++ Operating Systems and projects below. Use the toggles on the left to filter open source C++ Operating Systems by OS, license, language, programming language, and project status.

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

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  • 1
    android-x86

    android-x86

    A project to bring Android to the x86 platform

    This is a project to port Android open source project to x86 platform, formerly known as "patch hosting for android x86 support". http://www.android-x86.org/
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    Downloads: 19,696 This Week
    Last Update:
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  • 2
    CachyOS

    CachyOS

    Blazingly Fast & Customizable Linux distribution

    CachyOS - Arch Linux Based Distribution With Heavy Optimizations & Multi-Architectures For Ultimate Desktop Experience Filesystems: - btrfs - zfs - ext4 - xfs - f2fs Our installer will auto detect which micro architecture your machine got, if x86-64-v3 or x86-64-v4 is detected it will automatically use the optimized packages, which is around a 10 % performance improvement. Desktop Environments: - KDE - CuteFish - i3 - Gnome - Openbox - Wayfire - Xfce - LXQT - bspwm All packages are compiled with Full LTO and other optimization flags. Depending on the march your cpu have it is compiled against x86-64, x86-64-v3 or x86-64-v4. For the Desktop Environment we provide basic theming. In CachyOS-Hello can be also security related packages enabled, like: DNScrypt-proxy Firejail apparmor Security and Performance! https://discord.gg/qJqj94uFwE https://t.me/+zCzPX4cAFjk1MTY
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    Downloads: 4,012 This Week
    Last Update:
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  • 3
    Arrow OS

    Arrow OS

    It is an AOSP based project with an aim of keeping things clean!

    ArrowOS is an AOSP based open source project started with the aim of keeping things simple, clean and neat, both for the Android system and users. We understand the pain of unnecessary and sometimes rarely used mods/features being shipped with custom roms nowadays which may end up causing battery drains and/or memory leaks. This is being strictly avoided on our side keeping everything to a bare minimum, delivering the stable performance all the time without destroying the AOSP interface. With users getting more used to tweaks and features, we added just the right stuff that will be actually USEFUL at the end of the day.
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    Downloads: 927 This Week
    Last Update:
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  • 4
    Linuxfx Operating System

    Linuxfx Operating System

    Linuxfx Operating System

    Linuxfx is an Ubuntu-based operating system that contains a powerful set of tools and an amazing look and feel. It has compatibility with Windows apps through Wine and also runs Android apps. It's super stable, solid as a rock and very secure. It also does not need TPM or any other requirement for its operation and is compatible with any computer that has 2 cores and 3GB of RAM memory.
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    Downloads: 548 This Week
    Last Update:
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  • Photo and Video Editing APIs and SDKs Icon
    Photo and Video Editing APIs and SDKs

    Trusted by 150 million+ creators and businesses globally

    Unlock Picsart's full editing suite by embedding our Editor SDK directly into your platform. Offer your users the power of a full design suite without leaving your site.
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  • 5
    Lingmo OS
    Lingmo GNU/Linux (Lingmo OS) is a desktop based Linux operating system developed based on the open-source Debian kernel and adapted to the amd64 architecture. It has a beautiful desktop environment, software that is compatible with the desktop environment, and a unified UI style. The goal of Lingmo GNU/Linux is to provide users with a luxurious and practical desktop environment as well as a smooth experience on low performance hardware.
    Leader badge
    Downloads: 503 This Week
    Last Update:
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  • 6
    RebornOS

    RebornOS

    Made For You - Made With You

    RebornOS is an Arch Linux based distribution whose goal is to make Arch Linux more approachable to beginners. We stick close to Arch Linux, offer choices without much bloat, and we provide quite a bit more support and handholding than typical distributions so that beginners don't feel overwhelmed.
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    Downloads: 271 This Week
    Last Update:
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  • 7
    SerenityOS

    SerenityOS

    The Serenity Operating System

    SerenityOS is an open source Unix-like operating system project with its own custom kernel, graphical user interface, system libraries, and userland tools. It combines a nostalgic “90s UI aesthetic” with modern system capabilities: a preemptive, multi-threaded kernel, own browsers, network stack, file systems, IPC, security features, and a suite of graphical / developer applications. The project is both a hobbyist OS and a polished engineering sandbox.
    Downloads: 24 This Week
    Last Update:
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  • 8

    berryboot

    Berryboot -- Boot menu / OS installer for ARM devices

    Berryboot is a simple operating system installer and boot selection screen for ARM devices such as the Raspberry Pi and Cubieboard. It allows you to put multiple Linux distribution on a single SD card.
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    Downloads: 136 This Week
    Last Update:
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  • 9
    ALG

    ALG

    A Fast, Offline, Graphical Installer for Arch Linux

    We will follow a quarterly release schedule. This means there will be 4 releases annually. The release for Q1 should be in March. Thank you to all the members in the ALG community for their support.
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    Downloads: 503 This Week
    Last Update:
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  • No-Nonsense Code-to-Cloud Security for Devs | Aikido Icon
    No-Nonsense Code-to-Cloud Security for Devs | Aikido

    Connect your GitHub, GitLab, Bitbucket, or Azure DevOps account to start scanning your repos for free.

    Aikido provides a unified security platform for developers, combining 12 powerful scans like SAST, DAST, and CSPM. AI-driven AutoFix and AutoTriage streamline vulnerability management, while runtime protection blocks attacks.
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  • 10
    Leader badge
    Downloads: 125 This Week
    Last Update:
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  • 11
    The Fresh Project

    The Fresh Project

    Simply Awesome.

    The official home of Fresh, a One UI-based custom firmware for Samsung devices.
    Leader badge
    Downloads: 298 This Week
    Last Update:
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  • 12
    Vinari OS 4.0.0 HELIUM

    Vinari OS 4.0.0 HELIUM

    Vinari OS 4.0.0 HELIUM - Debian 12 Bookworm based 64-Bit OS

    Vinari OS 4.0.0 HELIUM marks the evolution of a Debian-based operating system, now embracing the 64-bit Debian 12 platform. This release is crafted with both everyday users and developers in mind, offering a seamless experience. At its core, Vinari OS 4.0.0 HELIUM showcases the intuitive GNOME desktop environment, enhanced with practical extensions such as GSConnect and DashToDock, among others. Our commitment to simplicity and convenience shines through, as Vinari OS 4.0.0 HELIUM adopts the 'deb' packaging format, ensuring effortless updates. Additionally, right out of the box, it seamlessly integrates with Flatpak and the Flathub repository, empowering users with a versatile software ecosystem.
    Leader badge
    Downloads: 184 This Week
    Last Update:
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  • 13
    Berry Linux

    Berry Linux

    A lightweight flavor of Linux based on Fedora

    Berry Linux is a bootable CD Linux, automatic hardware detection. Berry Linux can be used as a Linux demo, educational CD, rescue system. It is not necessary to install anything on a hard disk.
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    Downloads: 57 This Week
    Last Update:
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  • 14
    Nitrux

    Nitrux

    Simple, quick and responsive. That's Nitrux.

    Nitrux is a Linux desktop distribution based on Debian, using the Calamares installer and featuring the NX Desktop on KDE Plasma 5. It prioritizes simplicity and uses OpenRC instead of systemd. Nitrux leverages AppImages for software management and includes Maui Apps, created with the MauiKit UI framework. The distribution is consistently updated with the latest Debian base and the Liquorix kernel, offering performance enhancements like flexible inode placement, zstd compression, and checksum verification. Nitrux focuses on high performance with features such as an improved garbage collector, asynchronous I/O, and enabled zswap. It avoids synchronous updates to access times and manages VFS cache reclamation effectively. Nitrux is an immutable Linux distribution, employing overlayroot to maintain the integrity of the root directory, which remains unmodifiable by default. This immutability enhances system security, and resistance to tampering, and simplifies maintenance.
    Downloads: 19 This Week
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  • 15
    DracOS GNU/Linux Remastered
    What is DracOS GNU/Linux Remastered ? DracOS GNU/Linux Remastered ( https://github.com/dracos-linux ) is the Linux operating system from Indonesia , open source is built based on Debian live project under the protection of the GNU General Public License v3.0. This operating system is one variant of Linux distributions, which is used to perform security testing (penetration testing). Dracos linux in Arm by hundreds hydraulic pentest, forensics and reverse engineering. Use a GUI-based tools-tools the software using the CLI (command line interface) and GUI (graphical user interface) to perform its operations. Now Dracos currently already up to version 3.1.5 with the code name "KUNTILANAK WITH REMASTERED".
    Downloads: 21 This Week
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  • 16
    Syllable Desktop is a complete operating system that is easy to use, powerful, lightweight and extraordinarily fast and responsive. It has its own kernel, filesystem, GUI and applications. Syllable Server is a matching small and efficient Linux server.
    Downloads: 11 This Week
    Last Update:
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  • 17
    Life

    Life

    Linux for Education based on Ubuntu MATE

    Li-f-e: Linux for Education. A free Linux distribution for education.
    Leader badge
    Downloads: 38 This Week
    Last Update:
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  • 18
    NebiOS Alternative Mirror (Official)

    NebiOS Alternative Mirror (Official)

    An Ubuntu Linux-based OS that aims to end user.

    NebiOS is Ubuntu-based secure, privacy-focused universal OS for daily life, creativity, gaming & more. Official mirror - use if main site has download issues. Main site: nebios.org ⚠️ DON'T DOWNLOAD FROM UNKNOWN SOURCES! === 🚀 NebiOS X (next-gen) is here! Currently available as public beta in both SourceForge (here in "nextgen" folder) and nebios.org (under construction). Early release due to dev challenges - better hardware recommended. === 📋 NebiOS 3 Requirements (Stable - Final X11 version): - 64-bit dual-core x86 (Intel/AMD) or ARM, 2GB RAM, 24GB storage - OpenGL 3 GPU (something like Intel HD 4000 or better), Vulkan 1.3 for gaming - Works on 2012+ PCs. Pi 4: 720p 30fps (due hardware limits), Pi 5 not supported (NebiOS X will support) VM Support: Most software works (VirtualBox, VMware, QEMU). NebiOS X needs properly Wayland-supported 3D acceleration (only VMware supported in currently). ⚠️ NebiOS 2 support ends when X goes final (stable)
    Downloads: 14 This Week
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  • 19
    CyanogenMod 13

    CyanogenMod 13

    Android Marshmallow for MSM8930 Samsung Devices

    Pure CyanogenMod 13
    Downloads: 20 This Week
    Last Update:
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  • 20
    KaNaPi

    KaNaPi

    Educational Linux Distribution

    Main goals: * Prepare operating system based on Linux kernel and free software for use at home from scratch by building sources. Binary packages/images are also available. * Each package is installed in separate directory, so you can use different versions of applications and libraries by design. * There is only one user 'kanapi' with root permissions, so you don't have to login, remember passwords, etc. * Simple configuration * Automatic compilation.
    Downloads: 20 This Week
    Last Update:
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  • 21
    µOS++ (micro OS plus plus)
    "µOS++" (micro OS plus plus) is an open source, royalty-free, real-time operating system intended for embedded systems built around ARM Cortex M or AVR devices. It is based on a preemptive scheduler written in C++ (more info in the Wiki).
    Downloads: 17 This Week
    Last Update:
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  • 22
    NamelessROM

    NamelessROM

    Custom ROM for Android

    NamelessRom is opportunity; an opportunity to have a voice to the development team of the after-market firmware that you run on your device. The main goal of NamelessRom is to provide quality development for android devices, phones, and tablets alike. NamelessRom developers are available nearly 24/7 and respond to bug reports and feature requests almost instantly. This availability will allow you, the end-user, to have direct input into exactly what features and functions are included on the firmware that YOU run. NamelessRom == endless possibilities. Unless you have an iPhone, then you're out of luck. Get more information and find support on our forums at https://nameless-rom.org
    Downloads: 15 This Week
    Last Update:
    See Project
  • 23
    OnixOS

    OnixOS

    OnixOS Arch is a Linux-based and open source distribution.

    OnixOS Arch is a Linux-based and open source distribution. It comes with its own system-based functional programming language (O Language). It offers some customized tools for developers.
    Downloads: 8 This Week
    Last Update:
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  • 24
    Entropy Linux

    Entropy Linux

    Arch based, Modern, Midweight, Practical, Experimental, AMD, Szmelc

    Based on Arch. Built for Power Users and Sysadmins. Built for those who demand control over their system. Optimized for AMD™, it features a global dark theme and a suite of powerful tools for advanced users. Developed by two lead devs and their squad, it’s raw, unpolished, and built for those who love to tinker, learn, and push boundaries. Why Entropy? Power & Flexibility: Designed for power users, sysadmins, and DevOps pros. Advanced Toolset: Custom utilities to boost productivity, AMD™ Optimized: Engineered for peak performance on AMD hardware. Part of a Vision: A key piece of an evolving ecosystem, connecting projects seamlessly. Entropy is a constantly evolving system—designed to be explored, tweaked, and refined. Some setup may be required, but that’s part of the fun. What to Expect? A robust, adaptable distro with powerful tools and limitless customization. Occasional bugs, experimental features, and hidden easter eggs because pushing limits isn’t always smooth!
    Downloads: 5 This Week
    Last Update:
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  • 25
    Just Use Linux JULinux

    Just Use Linux JULinux

    A Linux Distribution for Windows Users and Mac users

    Goal: Create a Linux distribution that makes it easy and fun for Windows users to upgrade to Linux, without any real learning curve.
    Downloads: 3 This Week
    Last Update:
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