MDX — A BSD-style RTOS

Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.

A tiny real-time kernel focusing on formal reliability and simplicity.

Apache NuttX is a mature, real-time embedded operating system (RTOS)

RIOT - The friendly OS for IoT

RT-Thread is an open source IoT real-time operating system (RTOS).

Rust crate for FreeRTOS

A firmware platform aimed at quick prototyping, built around FreeRTOS and a feature-packed CLI

C Microkernel Realtime eXecutive

QP/C++ Real-Time Embedded Framework/RTOS for embedded systems based on active objects (actors) and hierarchical state machines

QP/C Real-Time Embedded Framework/RTOS for embedded systems based on active objects (actors) and hierarchical state machines

The QuarkTS port for C++. An open-source OS for embedded applications that supports prioritized cooperative scheduling, time control, inter-task communications primitives, hierarchical state machines and CoRoutines.

A Linux-like real-time operating system for Robotics and the Internet of Things (IoT)

Apache NuttX Apps is a collection of tools, shells, network utilities, libraries, interpreters and can be used with the NuttX RTOS

Test ESP32 multi-tasking run on Core 0 Core 1 simulatneously

This is an interrupt based button event library for the ESP32. It enables binding user defined actions to button events including 'Key Down', Key Up' , 'Key Press', 'Long Key Press' 'AutoRepeat Press' and 'Double-Click'. The actions associated it these events may be executed Asynchronously, Synchronously, or a Hybrid between the two.

C++ based Hierarchical / Finite State Machine library oriented for embedded and RTOS systems.

Raspberry RP2040 RTOS Toolkit

Bridle and kite line for embedded systems based on Zephyr.

LuatOS -- Powerful embedded Lua Engine for IoT devices, with many components and low memory requirements (16K RAM, 128K Flash)