Heronite

Heronite puts your games from Steam, Epic Games, GOG, Amazon Games, Xbox and PC Game Pass, Battle.net, EA app, Ubisoft Connect and Rockstar Games, plus emulated, native Linux and Windows games, into one Collection. It installs and updates Epic, GOG and Amazon games from a single download queue, launches games natively, through Wine/Proton on Linux or through an emulator, and records every play session. It can also import your games from Heroic, Lutris, Bottles, Faugus and Playnite.

I made it because my games were spread across many launchers, and the ones that brought them together were usually Electron apps that use a lot of memory while sitting in the background. Heronite is a single native Rust process drawn on the GPU with GPUI. On Linux it uses about 190 MB of memory while idle, and you can check that number on your own PC with a script in the repo.