ioBroker - flexible and modular application for the IoT and Smarthome
SEQUEmatic - SEQUEmatic lets you build sequences to link together your various smart devices.
Domoticz - Domoticz is a lightweight Home Automation System
Home - Securely control all your HomeKit accessories from your favorite iOS device.
MisterHouse - MisterHouse is an open source home automation program.
My Devices - Drag and drop IoT project builder for Raspberry Pi