- There’s Clip, a clipboard manager that plays silent audio for backgrounding (something that wouldn’t be allowed in the App Store) and uses a notification extension to allow you to quickly save the current content of your clipboard.
- Delta is a polished game system emulator — part of another category that isn’t allowed on the App Store.
It’s also a distribution mechanism; one could host their own repo of apps. Also AltStore lets you sideload arbitrary IPA files (from backups or devs without a Dev Program membership, for instance).
IMO AltStore is cool because it lets you use your iDevice more like a computer without breaking OS protections.
