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A Trivial Operating System for 8051 (ATOS51). ATOS51 is a trivial operating system for 8051 microcontroller. As its name, it provides only multitasking feature.2 weekly downloads
AVRCNC is a CNC-Controller based on an ATMega8 and some other (cheap) hardware. Main advantages compared to L297+L298 are: - simpler to build - easier to expand - mega8 controlls motors directly - no time-critical tasks on PC21 weekly downloads
A pre-emptive operating system for Atmel AVR 8-bit microcontrollers featuring queues, semaphores, a flash fileystem and high level peripheral device drivers.
Simple AVR OS2 weekly downloads
AWOS: The Universal Operating System.2 weekly downloads
A new advanced customizable graphic menu multi boot and OS loader based on XOSL project with gujin project features, this project integrate too a mini OS to provide certain customizable specialized maintenance tasks before boot partition/load OS target.
Agnix is an educational, network operating system kernel. It is ideal starting point to learn about operating systems. The main goal of the project is to provide a network kernel fully compatible with the Linux Kernel in the system call layer1 weekly downloads
Aicix is hobby Operating System (OS) of me. It won't be as big as Linux distributions are.
Embedded Real-Time Operating System (RTOS)2 weekly downloads
Andalus is an x86 based OS kernel
A operating system designed to be compatable with the linux and uinx software, that is capable of running as a modern operating system.1 weekly downloads
This is an OS kernel for arm920t platform.1 weekly downloads
ArchOpen is a project aimed at providing a fast, light and free operating system and applications for portable multimedia devices based on TI DM&DSC chips. It currently supports a lot of Archos multimedia devices (Gmini402,AV400,...).
Handix is the OS for the Aura line of simple, inexpensive palmtop-type handhelds, designed by this project.
Aurora OS is an operating system designed in a microkernel format for all users. The object is to develop a modular, mulitplatform, multitasking Operating System that is simple, effective, and powerful.
BOS – B.lu operating System, is an operating system dedicated to small microcontrollers and CPUs without MMU. Actually is dedicated to Texas Instruments MSP430 microcontrollers (it can be ported to other CPUs without great changes)3 weekly downloads
BNL OS is a free, modern operating system based on the design of Windows XP/2003.This is not a Linux based system, and shares none of the unix architecture. Please remember, this is in the development stage, and is not reccommended for everyday use.1 weekly downloads
fast single-privilege single-address-space preemptive-multithreading persistent data-centric secure multiuser operating system with safe-language and reconfigurable graphical interface1 weekly downloads
The Banana Kernel is an open-source pedagogical operating system intended to provide useful means for teaching basic OS concepts, with the possibility of interaction with external modules developed by the teacher or student.4 weekly downloads
Hobbyist operating system using a new microkernel. The objective is to not get bogged down by ancient legacy processor support. The OS is meant to be designed from the ground up, without utilizing any legacy or existing implementations or designs.
Blueport is an italian Open Source 32-bit operating system ... This project has temporarly moved to Gna.org: <a href="http://gna.org/projects/blueport">Blueport project</a>1 weekly downloads
The BohOS Operating System is an OS based on μMPS machine (http://mps.sourceforge.net/), divided into six layers. Each layer provides an abstraction layer to the i+1 layer.2 weekly downloads
CJet eXTreme OS is a new project to develop a cross platform operating system with a native application interface designed to make it easy to develop for several architectures at once.
CMAKE build enviroment for LPC2000 and LPC17xx Cortex MCUs18 weekly downloads
COBE is a operating system, wich is right in developing. Stay tuned.1 weekly downloads