GameHub is a unified library for all your games. It allows you to store your games from different platforms into one program to make it easier for you to manage your games.
automatically find artwork for games on SteamGridDB
setup emulators and automatically import emulated games
GameHub also has features like:
Overlays — multiple directories applied on top of each other. Each overlay is stored separately and doesn't affect other overlays. Overlays can be useful to manage DLCs and mods
Tweaks — environment variable and command line overrides that can be applied to games automatically