ioBroker - flexible and modular application for the IoT and Smarthome
tado Smart AC Control - Control any AC from anywhere with your phone
Domoticz - Domoticz is a lightweight Home Automation System
Nim Home Assistant (NimHA) - Nim Home Assistant is an open-source home automation platform running on Nim.
SEQUEmatic - SEQUEmatic lets you build sequences to link together your various smart devices.
My Devices - Drag and drop IoT project builder for Raspberry Pi