Showing 219 open source projects for "c-free"

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  • 1
    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: 2 This Week
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  • 2
    Puter

    Puter

    The Internet OS! Free, Open-Source, and Self-Hostable

    Puter is a browser-based personal operating system and file explorer built entirely with web technologies. It mimics the experience of a traditional desktop OS, allowing users to manage files, launch apps, and interact with a graphical interface—all within a web browser. The project is designed to be both functional and nostalgic, combining the aesthetic of retro operating systems with modern development tools like React and Tailwind CSS. Puter offers a self-hostable, customizable...
    Downloads: 28 This Week
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  • 3
    Pony OS

    Pony OS

    My Little Unix: Kernels are Magic

    ponyos is a lightweight, UNIX-like operating system developed as a personal hobby project by the creator of ToaruOS. It features a monolithic kernel written in C and aims for a POSIX-compliant environment with a built-from-scratch userland. ponyos includes a graphical interface, dynamic linker, shared libraries, and a package manager. It’s designed for fun, experimentation, and as a platform to learn and play with operating system internals, with surprisingly advanced features given its hobbyist origin.
    Downloads: 21 This Week
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  • 4
    Glow OS

    Glow OS

    System Analysis Software

    Glow is an educational, hobbyist operating system written in C and Assembly, developed to help learners understand the internals of OS design and kernel development. Targeting x86_64 systems, Glow features its own kernel, bootloader, and minimal userland. With clear code structure and a simple design, it serves as a playground for experimenting with low-level systems programming, boot sequences, interrupt handling, and basic UI components like shells and text rendering.
    Downloads: 17 This Week
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  • 5
    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: 41 This Week
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  • 6
    DreamShell

    DreamShell

    Operating system for the Sega Dreamcast

    The Dreamshell is the operating system for the Sega Dreamcast based on the KallistiOS kernel. It has a dynamic loadable modular system and interface for creating applications with XML UI and both C/C++ and Lua scripts on. You can see examples in ready-made applications and modules, drivers for various devices, formats and interfaces. Examples for audio and video decoding, compression, packaging, binding, network, emulation, scripts and more. From hardcore low-level assembler to high-level applications. There is also large subproject is the ISO Loader, which contains emulation of BIOS system calls, CDDA playback, and VMU, also it can hooking interrupts for various SDKs and more.
    Downloads: 10 This Week
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  • 7
    OSHI

    OSHI

    Native Operating System and Hardware Information

    OSHI is a free JNA-based (native) Operating System and Hardware Information library for Java. It does not require the installation of any additional native libraries and aims to provide a cross-platform implementation to retrieve system information, such as OS version, processes, memory and CPU usage, disks and partitions, devices, sensors, etc.
    Downloads: 7 This Week
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  • 8
    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: 4 This Week
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  • 9
    ANTIRTOS

    ANTIRTOS

    Function pointers queues classes library for Arduino

    ANTIRTOS is a compact real-time operating system (RTOS) written in ANSI C for microcontrollers and embedded systems. It is designed to be simple, portable, and efficient, making it ideal for resource-constrained environments such as IoT devices, robotics, and educational hardware projects. ANTIRTOS features a basic scheduler, support for cooperative and preemptive multitasking, and offers portability across different CPU architectures with minimal changes.
    Downloads: 4 This Week
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  • 10
    Emacs Prelude

    Emacs Prelude

    Enhanced Emacs 25.1+ distribution

    Prelude is an enhanced Emacs 25.1+ distribution that should make your experience with Emacs both more pleasant and more powerful. Prelude is an Emacs distribution that aims to enhance the default Emacs experience. Prelude alters a lot of the default settings, bundles a plethora of additional packages and adds its own core library to the mix. The final product offers an easy to use Emacs configuration for Emacs newcomers and lots of additional power for Emacs power users. Prelude bundles a...
    Downloads: 0 This Week
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  • 11
    MentOS

    MentOS

    An educational 32-bit linux-like Operating System

    MentOS is an educational operating system developed for academic use, particularly in university settings, to help students understand low-level system concepts such as process management, memory handling, and scheduling. Written in C, MentOS closely mimics a simplified Unix-like OS and includes hands-on implementations of key kernel features. Designed to be highly readable and modular, it offers a practical approach to learning systems programming through real-world kernel components, making it a valuable tool for operating system courses and personal exploration.
    Downloads: 3 This Week
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  • 12
    HiddenVM

    HiddenVM

    HiddenVM — Use any desktop OS without leaving a trace

    If at any time Tails pushes an unexpected update, and HiddenVM is not yet updated for it, and you are stuck with a new Tails and no working HiddenVM version, you can re-download and temporarily use an earlier version of Tails until HiddenVM is updated. There are archived direct HTTP download mirrors of Tails images, archived official torrents with PGP signatures, or third-party archives at linuxtracker.org or fosstorrents.com, etc. (Always verify third-party torrents with archived official...
    Downloads: 9 This Week
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  • 13
    CoolPotOS

    CoolPotOS

    CoolPotOS for ia32 / amd64

    CoolPotOS is a small, hobbyist operating system designed to be minimal and educational, offering the most basic kernel capabilities while remaining accessible to beginners. Written in C and Assembly, it focuses on bootstrapping, kernel entry, and simple console output. Though in early stages, CoolPotOS showcases the boot process, memory segmentation, and essential CPU features, serving as a great learning resource for those new to operating system internals.
    Downloads: 1 This Week
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  • 14
    Bottlerocket OS

    Bottlerocket OS

    An operating system designed for hosting containers

    Bottlerocket is a free and open-source Linux-based operating system meant for hosting containers. Bottlerocket focuses on security and maintainability, providing a reliable, consistent, and safe platform for container-based workloads. This is a reflection of what we've learned building operating systems and services at Amazon. The base operating system has just what you need to run containers reliably, and is built with standard open-source components.
    Downloads: 2 This Week
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  • 15
    WANIX

    WANIX

    A virtual environment kit for the local-first web

    wanix is a hobbyist Unix-like operating system written from scratch in C, aiming to implement core features of a traditional OS in an educational and modular way. The project walks through kernel development starting from bootloading, memory management, system calls, and eventually to user programs. With support for x86_64 and simple tools like a shell and basic file I/O, wanix serves as both a learning platform and a launching point for more advanced kernel features.
    Downloads: 3 This Week
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  • 16
    egos-2000

    egos-2000

    Helping students read all the code of a teaching operating system

    egos-2000 is a minimalist operating system built for educational and research purposes, offering a simplified kernel and runtime environment for exploring OS concepts. It runs on QEMU and is written in C/C++ with a focus on clarity and modularity. The system includes a basic filesystem, process management, and syscall interface, making it ideal for understanding core OS principles. egos-2000 is particularly well-suited for students learning about kernels, user-space interaction, and boot-time execution in a clean, hands-on environment.
    Downloads: 0 This Week
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  • 17
    DiscoBSD

    DiscoBSD

    2.11BSD-based Unix-like OS for STM32 and PIC32 Microcontrollers

    Discobsd is an experimental UNIX-like operating system derived from 4.4BSD-Lite2, focused on simplicity, transparency, and education. It strips away non-essential features and complexity to present a cleaner codebase suitable for study and hacking. Discobsd preserves the classic UNIX environment while allowing room for modern experimentation, such as porting to alternative platforms or introducing new subsystems. It is valuable for those interested in historical BSD systems, teaching OS...
    Downloads: 0 This Week
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  • 18
    Nightingale OS

    Nightingale OS

    A small operating system where I experiment and learn osdev

    ...It aims to be a clean platform for experimentation and learning, implementing a small kernel with core features like multitasking, memory protection, and a minimal filesystem. Its use of Rust provides strong guarantees around memory safety and eliminates common bugs found in low-level C-based systems. nightingale is ideal for those seeking to study OS development using a modern language with a strong safety model.
    Downloads: 1 This Week
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  • 19
    Linuxfx Winux OS

    Linuxfx Winux OS

    Winux Operating System by Linuxfx

    Break free from hardware restrictions and forced upgrades. Winux is the definitive successor for Windows 10 users seeking performance and reliability. Featuring an Intuitive Familiar Interface and Native Compatibility for your essential software.
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    Downloads: 629 This Week
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  • 20
    Downloads: 17 This Week
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  • 21
    fltr

    fltr

    Like grep but for natural language questions

    fltr is a minimal, dependency-free filtering utility written in C, inspired by UNIX philosophy and designed for high-performance data stream filtering. It allows users to apply pattern-based rules to lines of input—much like grep or awk—but with a focus on simplicity, low overhead, and customizability. It's intended for those who need a small, efficient tool to clean, parse, or analyze large streams of textual data on the command line without complex scripting or configuration.
    Downloads: 3 This Week
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  • 22
    Alt-F

    Alt-F

    free alternative firmware for the DLink DNS-320/320L/321/323/325/327L

    Alt-F provides a free and open source alternative firmware for the DLINK DNS-320/320L/321/323/325/327L and DNR-322L. Alt-F has Samba and NFS; supports ext2/3/4, VFAT, NTFS, BTRFS; RAID 0, 1, 5 (with external USB disk) and JBOD; supports up to 8TB disks; rsync, ftp, sftp, ftps, ssh, lpd, DNS and DHCP servers, DDNS, fan and leds control, clean power up and down... and more.
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    Downloads: 1,736 This Week
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  • 23
    Aura Operating System

    Aura Operating System

    AuraOS, the Franco-English Operating System developed in C#

    Aura Operating System is a GUI-based, object-oriented operating system written in C#. It is designed to showcase how high-level languages like C# can be used to create low-level systems such as kernels, user interfaces, and file systems. Aura features a colorful, windowed graphical desktop environment with built-in applications, all running on a custom kernel built from scratch. It is not based on Linux or Windows, but rather developed as an independent system with its own structure and drivers.
    Downloads: 11 This Week
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  • 24
    NebiOS Alternative Mirror (Official)

    NebiOS Alternative Mirror (Official)

    A unique Ubuntu-based Linux OS with its own desktop and ecosystem.

    NebiOS is an Ubuntu LTS-based Linux distribution with a custom desktop environment (NebiDE), built by one person. It combines a unique visual identity (Flat-Skeuomorphism), a widget-first desktop, and its own app format (.napp) into a cohesive platform — not just another reskin. Official mirror — use if the main site has download issues. Main site: https://nebios.org 📌 This mirror page is updated less frequently than the main site. For the latest information, visit...
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    Downloads: 1,718 This Week
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  • 25
    AzkaOs

    AzkaOs

    Open source operating system based flutter and kernel zircon

    AzkaOS is a personal and experimental operating system project aiming to create a lightweight and customizable platform written primarily in Python and C/C++. It combines ideas from traditional desktop OSes with a scripting-heavy approach, offering a hybrid system that prioritizes ease of customization and user scripting. Though still in its early stages, AzkaOS aims to support desktop environments, package management, and basic system utilities while enabling users to control behavior through Python scripts and a modular core.
    Downloads: 0 This Week
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