Macro Deck - Use smartphone as macropad for pc
Home-Assistant.io - Home Assistant is an open-source home automation platform running on Python 3.
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.
ioBroker - flexible and modular application for the IoT and Smarthome
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.
openHAB - "empowering the smart home" - vendor and technology agnostic open source home automation