I recently discovered nostr:nprofile1qy2hwumn8ghj7etyv4hzumn0wd68ytnvv9hxgqgdwaehxw309ahx7uewd3hkcqpqexv22uulqnmlluszc4yk92jhs2e5ajcs6mu3t00a6avzjcalj9csna6fpr

It reminds me of the kind of decentralization Nostr has but for a private chat client.

What other decentralized apps like these should I be looking at?