Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
ioBroker - flexible and modular application for the IoT and Smarthome
PlatformIO - Next-generation IDE for IoT
Domoticz - Domoticz is a lightweight Home Automation System
embedXcode - embedXcode is a template for Xcode.
Home - Securely control all your HomeKit accessories from your favorite iOS device.