The only Desktop one that comes to mind is Interstellar, but you could probably also use a web fronted that is instance independent like phtn.app (Which I would recommend if it works)

Well, swanstation doesn’t work standalone and some people have said it performs worse, but it’s not like you need a very powerful system anyway

AFAIK retroarch uses swanstation, a hard fork specifically for retroarch created in 2024 when duckstation switched from GPL to a source available license. Also retroarch alternatively has the beetle core which is also a pretty good ps1 emulator