Amethyst - an app on Android for building social network. My main app.
Primal / NoStrudel - a social app that I use on Desktop to see a different UI
Alby - LN wallet, authorization to other apps, still to explore. Second most important.
Fountain - an app for listening for podcasts
Ostrich Work - job board on Nostr. It is related to what I do with Bitcoin and Nostr.

Something what I am looking for still - private / group chat with good user experience.