FreeDOS is a free DOS-compatible operating system.
FreeDOS is a complete, free, DOS-compatible operating system that you can use to play classic DOS games, run legacy business software, or develop embedded systems. Any program that works on MS-DOS should also run on FreeDOS. It doesn’t cost anything to download and use FreeDOS. You can also share FreeDOS for others to enjoy! And you can view and edit our source code, because all FreeDOS programs are distributed under the GNU General Public License or a similar open source software license.
Run Linux on Windows or other OSes, natively.
Cooperative Linux is the first method for optimally running Linux on Windows and other operating systems natively. It is a port of the Linux kernel and support code that allows it to run cooperatively without emulation along with another operating system.
OS-9/6809 compatible operating system for Tandy CoCo and Dragon
The NitrOS-9 Project provides an OS-9/6809 compatible operating system for the Tandy/TRS-80 Color Computer and Dragon home computer.
Run Linux on the Playstation 2
Kernelloader is a free bootloader for PS2 Linux and other Playstation 2 operating systems. Loading can be done by "Action Replay Media Player", by "memory card exploit", by "FMCB" or any other homebrew loading method. If you downloaded the latest Linux Live DVD, you need to run the online updater to be able to play Youtube videos.
Real-Time Embedded Operating System
Nuttx is a real time embedded operating system (RTOS). Its goals are: (1) small footprint usable in deeply embedded, resource constrained environments, (2) fully scalable from tiny (8-bit) to moderate (32-bit), (3) standards compliance, (4) real time, and (5) totally open. Think "Tiny Linux".
Open Source SW/HW Project for Embedded Ethernet Applications. Works with AVR ATmega256/128/103, AVR32, SAM7X, SAM7S(E), SAM9, AT91X40, GameBoy Advance, Cortex M3 / M4 (STM32, NXP LPC, LM3S), Freescale Coldfire, RTL8019AS, LAN91C111, CS8900 and DM9000E chips. Offers a tiny TCP/IP stack including HTTP, FTP and DHCP.
This project maintains the Linux Console tools, which include utilities to test and configure joysticks, connect legacy devices to the kernel's input subsystem (providing support for serial mice, touchscreens etc.), and test the input event layer.
scmRTOS is tiny Real-Time Preemptive Operating System intended for use with Single-Chip Microcontrollers. scmRTOS is capable to run on small uCs with as little amount of RAM as 512 bytes. The RTOS is written on C++ and supports various platforms.
Blob is a boot loader for SA11x0 (StrongARM) platforms. Blob is able to boot a Linux kernel stored in flash or RAM and provide that kernel with a ramdisk (again from flash or RAM).
DOS/32 Advanced DOS Extender is a drop-in replacement for the DOS/4GW DOS Extender and compatibles. Being fast, small and flexible DOS/32A can be used in many environments, from embedded systems to DOS emulators, by both developers and end users alike.
Powertweak-Linux is a port of the similarly named Microsoft Windows tool. It optimises your system to run at peek performance, by adjusting hardware settings, and config files. Work is underway in CVS to add features such as additional power management by
RTOS for Critical Systems
Pharos is a free open-source Real-Time Operating System for Critical Systems with the following characteristics: -Security: With memory and enhanced time partitioning. Each partition protected with hardware MMU/MPU and operating in user mode -Quality: Low cyclomatic, high comments, low nesting level, MISRA. -Mixed Criticality: Partition isolation. Native support for sporadic, periodic and aperiodic threads under a fixed-priority preemptive scheduler, including execution time protection (threads are prevented from executing for more time than they are configured to) -Determinism: Hard real-time determinism, most calls areO(1) and very few cases are O(Log(N)) - they are well identified in the user manual. Dynamic memory free Pharos takes ARINC and moves it one step further, improving responsiveness and isolation. Supports ARM R5, M4, 926EJ-S. We are a group of enthusiastic software developers that also implements client custom software. Contact: firstname.lastname@example.org
The OpenSSI project is a comprehensive clustering solution offering a full, highly available SSI environment for Linux. Goals for OpenSSI Clusters include availability, scalability and manageability, built from standard servers.
ViRT-K is a virtual Real-Time Kernel for the Cell Broadband Engine running under Linux
POSIX API for Win2K-XP. Mainly implemented in the driver. Included: write-on-copy fork, threads, mutexes, spins, condvars, rwlocks, signals ... Signals/cancelation interrupt all waitable syscalls, NT syscalls are automaticaly restarted.
An open source OS written in assembly.
An open source OS. It is 32-Bit and when possible 64 and 128-Bit. We are working on a complete rewrite. After which we will work on our UI. ATTENTION!: After AquariusOS 0.0.4 AquariusOS will be based off of aqua-next. 0.0.5 with an aqua-next base will hopefully be released BEFORE 2016.
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.
Simplest kernel for cooperative multithreading
Simplest of possible ways to multithreading on the smallest microcontrollers. This project is demonstration the programming technique of the multithreading with polling the system state. Published code debugged and ready to use in your projects.
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.
EMOS is a real-time embedded operating system core derived/upgraded from ucOS/II; EMOS is a realtime embedded operating system derived from ucOS-II v2.0, with many modifications, But the core idea is the same;
This is GIMI, the Graphical Interfaced Multitasking Interpreter. One of the few GUIs made in QuickBASIC featuring multitasking. This one has its own script language for making programs, damm fast SVGA modes, lots of programs, and more!
MikeOS is a an open source 16-bit operating system for x86 PCs, written in assembly language, which boots from a floppy disk or CD-ROM. It is designed as a learning tool for x86 assembler and basic OS design.
SuperWaba is a Virtual Machine for handhelds. Runs in PalmOS, Windows CE, Win32, and is fully emulated under JDK/browser. Supports Exceptions, has a complete set of UI controls (Palm/WinCE), double and long, grayscale/color, sockets/serial/IR/Bluetooth
Embedded Operating System
EXIRION/OS is an operating system for embedded computer systems. These operating systems are designed to be compact, efficient at resource usage, and reliable, forsaking many functions that non-embedded computer operating systems provide, and which may not be used by the specialized applications they run. They are frequently also referred to as real-time operating systems, and the term RTOS is often used as a synonym for embedded operating system. EXIRION/OS project, a Open operating system for computers that can be used in specific operations that require execute a task at a time, EXIRION/OS operating system is a monolithic and mono layered task, which can be used to control complex electronic equipment without the use of instruments PLC, offering a wide range of electronic and industrial applications, EXIRION/OS is also an educational tool, it is an open source operating system to use it as an example of building operating systems in universities and technical colleges.
A port of the Linux 2.4.x kernel and assorted userland software to the Sega Dreamcast games console.