Macro Deck - Use smartphone as macropad for pc
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.
TouchPortal - Touch Portal is a companion app to control a PC or a Mac by using a deck of buttons to improve the workflow & productivity of game streamers, content creators and professionals.
SmartThings - SmartThings makes it easy to turn your home into a smart home.
Unified Remote - Unified Remote is a software app available for iPhone, Android, and Windows Phone mobile operating systems. It's designed to turn your smartphone into a universal remote. Read more about Unified Remote.
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.