Retropie!

EmulationStation is a graphical and themeable emulator front-end that allows you to access all your favorite games in one place, even without a keyboard!

Lakka is the official Linux distribution of RetroArch and the libretro ecosystem. Each game system is implemented as a libretro core, while the frontend RetroArch takes care of inputs and display.

recalboxOS is a light embedded system created to run on the raspberryPi ,raspberryPI 2 and on PC x86/x64.

batocera.linux is an operating system (like Windows 10 and Mac OS) specialized in retrogamingavailable for your pc and different nano computers like the Raspberry and the Odroids.Note that you must own games you play in order to respect legality.

PES is a graphical front end for a variety of games console emulators that has been written in Python which is intended for use on the Raspberry Pi. For ease of use on the Raspberry Pi, PES has been packaged into a SD card image using ArchLinux as the OS together with various emulators and utilities including PlayStation 3 control pad support via Bluetooth to allow you to create your own games console. Support for RetroAchievements.org is included and you can even use your TV remote to browse the user interface! »