The two original developers of ZSNES are finally back together! Introducing SUPER ZSNES! Re-written completely from scratch, this GPU-powered SNES emulator is here to bring you the following: some of what is familiar, some of what’s new, and then some of what goes beyond.
Key features:
- Far more accurate CPU and Audio cores than the original ZSNES
- GPU-powered PPU core to allow for hi-res Mode 7 and special per-game enhancement features
- Classic UI with falling snow, modernized with higher definition and improved UX
- Fast forward, rewind, save states, auto save history, save bookmarks, cheat codes, quick load, and more
- No Vibe Coding. Classic development style.
- Super Enhancement Engine, where the ZSNES developers are enhancing the games one at a time



Unfortunately not open source from what I can see, at least not yet.
Unless they switch away from a Unity base, it’ll never be fully FOSS because Unity isn’t.