ioBroker - flexible and modular application for the IoT and Smarthome
tado Smart AC Control - Control any AC from anywhere with your phone
Nim Home Assistant (NimHA) - Nim Home Assistant is an open-source home automation platform running on Nim.
Domoticz - Domoticz is a lightweight Home Automation System
My Devices - Drag and drop IoT project builder for Raspberry Pi
LOOFT- A/C Redefined - Comfort Automated