BlueStacks - BlueStacks is a website designed to format mobile apps to be compatible to desktop computers, opening up mobile gaming to laptops and other computers. Read more about BlueStacks.
RetroArch - RetroArch is a frontend for emulators, game engines and media players.
Android-x86 - Run Android on your PC.
Playnite - Source code generated using layoutit.com
YouWave - Runs Android apps and app stores on your PC, no phone required
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.