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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.
libosdk stands for operating system development kit, which is simply a library containing low-level architecture dependent assembly procedures you can use to develop your own os without using assembly language or even know about it.
A basic operating system that can realize some basic functions. It is developing for educational purposes. It is being developed simultaneously with sslib, the Simple Standard Library for developers program no-OS apps, program NuOS commands or program an operating system.
IdyllaOS is simple operating system. System is based on monolithic kernel with drivers of devices loaded as kernel modules. As required for a modern operating system, it supports features like virtual memory, memory protection and multitasking.
Ace is a micro kernel for developers and researchers. The main goal is to create a very light and compact kernel from scratch with modern OS research concepts.
FrakeOS is a new OS developed by Charles Frake.
Currently, it is a simple bootloader written in NASM. I plan to continue researching Assembly and finish the bootloader. I plan to start coding a kernel in C after the bootloader is finished.
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.
Squeak is an open, highly-portable Smalltalk-80 implementation, it runs on almost every operating system, and in bare hardware. What we gonna do with SqueakNOS is getting rid of the OS under Squeak, and we'll implement all the functionality in Smalltalk
COS is an Open Source Operating System, which is currently in development. It is made from scratch, except it uses GRUB as a boot loader. Comments would be kindly taken, and all criticism is accepted.
A real time OS based on uITRON 4.0 full specification. You can use dynamic objects and easy to use. This is suitable for 16bit-CPU, even. First target is H8/300H (AKIZUKI AE-H8/3069-LAN). About the ITRON specification: http://www.assoc.tron.org
It is a minimal linux like kernel for x86 architecture. It is mostly the source code from the tutorial "Roll your own toy UNIX-clone OS" written by James Molloy: http://www.jamesmolloy.co.uk/tutorial_html/index.html It is encoded in a bash script.
FreeOS/1 is a Free, Open Source, FreeDOS based Free and Open Source Alternative OS, with open source Microsoft Windows compatibility using HXDOSExtender KernelEx,and ReactOS source code. FreeOS/1 will include new technologies and will be easy to use
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.
Prex is a portable real-time operating system for embedded systems. The small, reliable and low power kernel is written in C language based on micro kernel design. File system, UNIX process and networking features are provided by user mode tasks.