Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
Push2Run - Push2Run is a free program for Windows which lets you to control your PC or laptop using your Google Home, Google Mini, Google Max or smart phone running Google Assistant.
ioBroker - flexible and modular application for the IoT and Smarthome
SmartThings - SmartThings makes it easy to turn your home into a smart home.
KreateCube - KreateCube is an online platform, helps you find the nearest architects, interior designers, and firms to plan, design, and build your project within your budget. If you are professionals, explore business leads as per your locations.
Google Home - Set up, manage, and control your Chromecast, Chromecast Audio and Google Home devices.