Is there no automatic discovery so far? Would be great if any dev could sign an event to verify app/service xyz is from them and then we would have easy global discovery or even better based on personal web of trust etc.

https://nostrapps.com/ ?

was about to post https://nostrapp.link/ but looks like the website is gone now the closest repository most recent, would be https://nod.city/

this one is fun Try Nostr Clients Without Installing https://nostrich.love/simulators

Consolidated all those suggestions in the comments with the other ones I know about, now we got an impressive list. nostr:nevent1qqsrns9fg8t2xp63j8sr06esnsfw2e6v9jm9chp63sst2p2cmfz0pjgpzamhxue69uhhyetvv9ujuurjd9kkzmpwdejhgtczypm4j48hx9q3yjy6fg57c6ftwguxl4sten4sxzx5yvgpa2tec4agqqcyqqqqqqgcczlcv