Keepass is FOSS and there are compatible clients for basically every OS you might think of, including IOS, Android, OSX, Windows, and Linux. It does not includ

Keepass is FOSS and there are compatible clients for basically every OS you might think of, including IOS, Android, OSX, Windows, and Linux. It does not include multi-device sync, but it works nicely with other solutions that provide that function. So drop in your preferred file sync solution (ideally, cloud-free) and you're all set.