A memory safe focus C framework, RAII, I/O, coroutine and other concurrency primitives.

osFree Windows Kernel for osFree Win16 Personality

A coöperative multitasking framework based on `liburing` and `libucontext`

Minimalist cooperative operating system supporting multiple tasks with MMU protection

A 64-bit cooperative multi-tasking toy operating system in C

Cooperative Multitasking 64-bit Operating System for Intel x86 processor. Functionalities include Shell with pipe, Background Process, Interrupt Handling, Dynamic Memory Allocation, 4-level Paging, Scheduling, tarfs , ELF loading, Memory Mapping, COW fork, SEGV handling, System calls.

Simple cooperative operating system in pure C. Suitable for any microcontroller. Small footprint.

TISM - The Incredible State Machine. A framework in C for developing multitasking applications on the Raspberry Pi Pico (or compatible RP2040 boards).

Example STM32 and cooperative-multitasking OS ( QuarkTS )

Cooperative multitasking and low-power idle for ARM Cortex-M3/M4/M33

Single file library implementing userspace cooperative multitasking

Cooperative multitasking application framework for the ATmega328P

A minimalistic context switcher for cooperative multitasking

Coroutines in C

A minimal run-to-completion scheduler with process management API, configurable context switching, and a demo application using 8 concurrent LED processes.

Example with System Operating (QuarkTS) in AVR - ATmega1284p

Cooperative task scheduler for AVR microcontrollers

Simple Traffic Light based on Cooperative Scheduler.

A lightweight, portable fiber library (stackful coroutines) for cooperative multitasking on bare-metal and hosted environments.

Cooperative multithreading library on stm32 something like boost::fiber