Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
RetroArch - RetroArch is a frontend for emulators, game engines and media players.
Type2phone - Type2Phone: Use your Mac as keyboard for iOS devices
Batocera.linux - Batocera.linux is an open-source and completely free retro-gaming distribution that can be copied to a USB stick or an SD card with the aim of turning any computer/nano computer into a gaming console during a game or permanently.
1keyboard - Type on your iPhone, iPad or AppleTV using your Mac keyboard
Playnite - Source code generated using layoutit.com