We Love Lights - An app for controlling Philips Hue lights and scenes
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Corluma - Smart Lights Made Simple. Corluma unlocks new features for lights and allows you to control them all at once.
ioBroker - flexible and modular application for the IoT and Smarthome
HomeLights - HomeLights is the ultimate solution to quickly and easily control your HomeKit lights.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation