Youtube Control - A simple and ready to use remote controller to youtube
Realsteer - Don't have a racing wheel?
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.
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Monect - Make the best use of sensors on smart device to control PC, simulate steering wheel, game-pad...
BTT Remote - A remote control for you Mac, using your iPhone or iPad