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.

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
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  • MongoDB Atlas runs apps anywhere Icon
    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.
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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: 19,965 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: 3,940 This Week
    Last Update:
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  • 3
    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: 954 This Week
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  • 4
    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: 768 This Week
    Last Update:
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  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
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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.
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    Downloads: 527 This Week
    Last Update:
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  • 6
    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: 711 This Week
    Last Update:
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  • 7
    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: 269 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: 142 This Week
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  • 9
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    Downloads: 120 This Week
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  • Simply solve complex auth. Easy for devs to set up. Easy for non-devs to use. Icon
    Simply solve complex auth. Easy for devs to set up. Easy for non-devs to use.

    Transform user access with Frontegg CIAM: login box, SSO, MFA, multi-tenancy, and 99.99% uptime.

    Custom auth drains 25% of dev time and risks 62% more breaches, stalling enterprise deals. Frontegg platform delivers a simple login box, seamless authentication (SSO, MFA, passwordless), robust multi-tenancy, and a customizable Admin Portal. Integrate fast with the React SDK, meet compliance needs, and focus on innovation.
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  • 10
    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.
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    Downloads: 239 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.
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    Downloads: 235 This Week
    Last Update:
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  • 12
    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: 103 This Week
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  • 13
    Haiku is an open-source operating system currently in development designed from the ground up for desktop computing.
    Downloads: 39 This Week
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  • 14
    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: 19 This Week
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  • 15
    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: 51 This Week
    Last Update:
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  • 16
    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: 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: 41 This Week
    Last Update:
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  • 18
    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: 9 This Week
    Last Update:
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  • 19
    CyanogenMod 13

    CyanogenMod 13

    Android Marshmallow for MSM8930 Samsung Devices

    Pure CyanogenMod 13
    Downloads: 34 This Week
    Last Update:
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  • 20
    MyOS, FLOSS Operating System
    A Free and Open Source Operating System by SamyPesse Version Actuelle: 10.04 Web-Site: http://myos-os.org [French Only]
    Downloads: 18 This Week
    Last Update:
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  • 21
    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: 15 This Week
    Last Update:
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  • 22
    StateOS

    StateOS

    Free real-time operating system (RTOS) for microcontrollers

    StateOS is a compact, open-source real-time operating system designed for embedded systems and written in ANSI C. It supports cooperative and preemptive multitasking, making it ideal for running multiple real-time tasks on microcontrollers. StateOS emphasizes clarity and ease of integration with existing projects and provides a full set of synchronization primitives, timers, and message-passing tools. It's widely used in industrial and academic settings for prototyping and low-level firmware development.
    Downloads: 1 This Week
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  • 23
    hhuOS

    hhuOS

    hhuOS - A small operating system

    hhuOS is an educational operating system project developed by students at Heinrich Heine University (HHU) in Düsseldorf, Germany. It is built from scratch in C and Assembly and intended as a teaching tool to help students grasp the foundations of kernel development, memory management, system calls, and multitasking. The project focuses on clarity, modularity, and hands-on experimentation with real OS components, making it suitable for OS development courses or personal exploration.
    Downloads: 1 This Week
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  • 24
    pranaOS

    pranaOS

    Smart Operating System for x86, ARM, Mobile, Watch

    pranaOS is a hobby operating system built from scratch in C and C++, intended to teach and demonstrate operating system fundamentals such as process control, memory management, and kernel bootstrapping. It is designed for the x86_64 architecture and features a custom shell, task scheduler, and keyboard driver. With a strong focus on education, pranaOS serves as a base for experimenting with kernel development and learning how different subsystems interact in a functioning OS.
    Downloads: 1 This Week
    Last Update:
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  • 25
    BEE free TECH

    BEE free TECH

    [ Beautiful, Effective, Efficient, Freedom, Technology ]

    BEE free 20.04 is a community-driven Linux distribution based on Ubuntu 20.04 .
    Downloads: 5 This Week
    Last Update:
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