Cemu is an open source emulator for WiiU which is considered to be in experimental state. That said, it's able to play quite a few number of games very smoothly without major issues and graphics packs can even be injected into games. Please check compatibility list...
GroovyMAME is a fork of MAME aimed at CRT monitors, with a strong focus on CRT preservation since they argue its the only display technology that accurately replicates the genuine video game experience...
Steam Rom Manager is a bulk game importer and artwork manager for Steam. It's basically an app for managing ROMs and benefiting from what Steam has to provide. This includes using big picture mode, its overlay, controller management layout, streaming...
