We have our own community apps, if it's not for anything that needs to stay private, and private groups are coming, too. Check out #Flotilla by nostr:nprofile1qqsf03c2gsmx5ef4c9zmxvlew04gdh7u94afnknp33qvv3c94kvwxgspr3mhxue69uhksmmyd33x7epwvdhhyctrd3jjuar0dak8xtcppemhxue69uhkummn9ekx7mp0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7208x3z. Not a lot of action there right now, but it would be nice to see something Nostr-native grow.

There is a Nostr Talk community there that has some devs. relay.nostrtalk.org