ChibiOS/RT is a free and efficient RTOS designed for deeply embedded applications. It offers a comprehensive set of kernel primitives and supports many architectures: ARM7, Cortex-M0, Cortex-M3, Cortex-M4, PowerPC e200z, STM8, AVR, MSP430, ColdFire, H8S, x86.
amforth is an extendible interpreter on microcontrollers
amforth is an extendable command interpreter running on AVR ATmega and TI MSP430 microcontrollers. Turnkey actions for fully autonomous operations are possible as well. The command language is close to the Forth 2012 standard.
Real-time, modular, microkernel-based operating system under development for i386. The first goal is to support 32-bit DOS protected mode applications made with DJGPP as well as native applications.
CMAKE build enviroment for LPC2000 and LPC17xx Cortex MCUs
The goal of project is to build CMSIS like environment for LPC2000 series MCU and to write RTOS for LPC2000 and Cortex Microcontrollers
MinopsOS is a tiny operating system for PC computers.
MinopsOS is a tiny operating system for PC computers. It's small enough to fit inside the boot sector of a floppy disk.
Unix-like operating system for the TI-89 and TI-92+ graphing calculators.
Embedded Real-Time Operating System (RTOS)
Akalon is a Bare-Bones Embedded RTOS that's designed to be simple and portable to any Microprocessor or System (Board). Currently supports the Intel and ARM Architectures.
ELKS is a subset of the Linux kernel that runs on IBM compatible PCs from 8086 up. It is intended to get use out of obsolete old hardware, for use in embedded systems, and as an educational tool. ELKS has been moved to Github to protest SourceForge's installer adware hijacking. This does not directly affect ELKS, but it does affect many major open source projects such as Gimp and FileZilla by attempting to trick the user into installing adware in order to download these programs. I refuse to leave ELKS here with such policies in effect. If you have questions about this, please email firstname.lastname@example.org.
K-OS is an open-source realtime-operating-system based on the OSEK/VDX standard aimed at compiler and microcontroller independence. Currently we support Motorola (Freescale) HC12/HCS12/HCS12X targets.
Written entirely in 8051 assembly this is a bare bones Real Time OS (RTOS) kernel for the P89C668 microcontroller. The OS itself is inspired by the discussion in 'MicroC/OS-II: The Real-Time Kernel' an excellent book by Jean J. Labrosse.
The definitive DASH7 firmware project
OpenTag is a full-featured communications stack for DASH7 Mode 2 (ISO 18000-7.4). It is intended to run on embedded HW, especially RF SoCs, but it can be ported to almost anything. OpenTag's main feat is its large featureset, but small footprint. Also see the official OpenTag website: http://www.indigresso.com/wiki/doku.php
A lightweight, simple and easy to use embedded system task scheduler. RataOS is written as a high level C, with a simple HAL & API structure, allowing it to be ported between embedded devices easily.
A computer operating system.