Mongoose OS

Mongoose OS is an Internet of Things (IoT) Firmware Development Framework available under Apache License Version 2.0. It supports low power, connected microcontrollers such as: ESP32, ESP8266, TI CC3200, TI CC3220, STM32 (STM32L4, STM32F4, STM32F7 series). Its purpose is to be a complete environment for prototyping, development and managing connected devices.
It is designed to reduce the time and costs associated with IoT projects.
Mongoose OS fills a noticeable gap for embedded software developers: the gap between Arduino firmware suitable for prototyping and bare-metal microcontrollers' native SDKs.
It is developed by Cesanta Software Ltd., a company based in Dublin (Ireland) and dual licensed.
License.
Mongoose OS is Open Source and dual-licensed: