Macro Deck - Use smartphone as macropad for pc
KDE Connect - Integrate Android with the KDE Desktop
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.
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.
VLC Mobile Remote - This VLC Remote app for iPhone, Android & iPad lets you control VLC Player on PC or Mac. Also browse, play computer files & YouTube, Netflix, Prime videos.
Remote Mouse - Turn your smartphone into a wireless touchpad and keyboard now!