LudOS is the Operating System version of Ludo
It targets Raspberry Pi and small PCs in order to recreate a console experience, where you can play retro games on a couch with friends in front of a TV.
Like Lakka, it is based on LibreELEC and can launch libretro cores only.
It is simpler in spirit, with less supported consoles and joypad, but still works very well if you are fine with these limitations.
LudOS is still in alpha stage. There are still important bugs.