Best Open Source C ROMs

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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

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.

47 Reviews

Downloads: 365 This Week

Last Update: 2024-11-21
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2

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.

7 Reviews

Downloads: 344 This Week

Last Update: 2025-10-16
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3

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.

Downloads: 54 This Week

Last Update: 2024-04-23
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4

Another Kernel

A kernel for your device

Downloads: 1 This Week

Last Update: 2023-09-20
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