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

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  • 1
    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: 772 This Week
    Last Update:
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  • 2
    FreeRTOS Real Time Kernel (RTOS)

    FreeRTOS Real Time Kernel (RTOS)

    Market leading real time kernel for 40+ microcontroller architectures

    ************************************************************************************************************************ * The primary FreeRTOS repository is now in Git. Go to https://github.com/freertos for the latest FreeRTOS kernel and libraries. * Our support has moved to https://forums.freertos.org. ************************************************************************************************************************ FreeRTOS is a market-leading real-time operating system (RTOS) for microcontrollers and small microprocessors. Distributed freely under the MIT open source license, FreeRTOS includes a kernel and a growing set of libraries suitable for use across all industry sectors. Visit https://www.freertos.org for more information and other download options. Note about support/discussions forum: The FreeRTOS support forum has moved to https://forums.freertos.org. Please update your bookmarks and create new posts in the appropriate category in the new community forums.
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    Downloads: 364 This Week
    Last Update:
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  • 3
    EmuTOS

    EmuTOS

    Free operating system for Atari computers, and more.

    EmuTOS is a TOS compatible operating system for Atari ST series computers, and more. It is made from Digital Research's GPLed original sources and is a free and open source alternative to Atari proprietary ROMs.
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    Downloads: 330 This Week
    Last Update:
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  • 4
    Octavi-OS

    Octavi-OS

    fast mirror online soon

    An AOSP based custom rom with new look and feel and massive customisations , contains everything you need .
    Downloads: 107 This Week
    Last Update:
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  • 5
    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: 71 This Week
    Last Update:
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  • 6
    uCON64 is a tool to backup all kinds of video games. It supports almost every available backup unit for cartridge-based consoles and performs many other tasks like ROM hacking.
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    Downloads: 115 This Week
    Last Update:
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  • 7
    Cambridge Z88

    Cambridge Z88

    Software development for 4Mb portable, using Z80 CPU and AA batteries

    This project is for the portable computer "Cambridge Z88", produced by Sir Clive Sinclair (of ZX Spectrum fame). We continue to support software development (ROM, 3rd party apps on memory cards and desktop applications). We have moved to https://cambridgez88.jira.com/wiki (development, source code and documentation). However, we continue to publish files for download here.
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    Downloads: 54 This Week
    Last Update:
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  • 8
    OpenBLT

    OpenBLT

    Bootloader for STM32, XMC, HCS12 and other microcontroller targets.

    OpenBLT is mostly used as an STM32 bootloader, due to the popularity of STM32 microcontrollers. However, the bootloader’s architecture is such that it can work with any microcontroller and use any type of communication interface to perform firmware updates.
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    Downloads: 52 This Week
    Last Update:
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  • 9
    WitAqua

    WitAqua

    Android Custom ROM based on LineageOS

    We make WitAqua in Japan. It's an Android Custom ROM based on LineageOS.
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    Downloads: 20 This Week
    Last Update:
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  • 10
    General Sound Interface (GSI). This is a sound interface capable of controlling every detail of sound playing. It can use the following interfaces: OSS, Ultrasound (Linux 2.0.x & 2.1.x), FreeBSD (pcm), and generic /dev/audio.
    Downloads: 1 This Week
    Last Update:
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  • 11
    SuperOSR

    SuperOSR

    Customized Android Rom.

    SuperOSR is a customized Android version for select devices. Is a replacement for the firmware or "ROM" installed on your smartphone, tablet, media center or another Android device. Is based on the Android Open Source Project and the open source community over the world.
    Downloads: 0 This Week
    Last Update:
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