Espressif IoT Development Framework
Market leading real time kernel for 40+ microcontroller architectures
Real-Time Event Frameworks based on active objects & state machines
AO RTOS is small real time OS based on Active Object concurrency model
HomeKit Accessory Development Kit (ADK)
Free real-time operating system designed for microcontrollers
A simulator for Atmel's 8/16-bit AVR microcontrollers
A Development Framework for Coldfire