amforth is an extendible interpreter on microcontrollers
An ADL-mode rewrite of the ez80 CP/M 3.1 port
A tapas/topaz/sapphire kernel optimized for smoothness and low-memory
Building and running ancient Linux on Windows
A microkernel-based multiserver operating system written from scratch.
OS-9/6809 compatible operating system for Tandy CoCo and Dragon
Real-Time Embedded Operating System
An operating system written in RTL
FreeDOS is an open source DOS-compatible operating system
Lorena es un sistema operativo escrito en C, C++ y Ensamblador.
A multiplatform, DOS-like operating system
64-BIt Operating System with Compiler
My own operating system.
UEFI GTP fdisk is a disk partitionning tool running under UEFI/BIOS
Neptune is a kernel and operating system for x86 PCs.
Embedded Operating System
A small operating system, compatible with MS-DOS, written in assemly
Embedded Real-Time Operating System (RTOS)
Project has been move to https://github.com/ciaa/Firmware
operating system for Intel 8086 / 8088