https://www.0xchat.com/#/ - Private messaging - think WhatsApp

Xitter Like Clients:

https://damus.io/ - iPhone client

https://nostrapps.com/amethyst - Android client

https://primal.net/downloads - Android, iPhone & Desktop

Interesting sites:

https://zap.stream/ - Video streaming

https://fountain.fm/ - Podcasting

https://wavlake.com/ - Music streaming

https://shopstr.store/ - Online shop

https://zap.cooking/recent - Cooking recipes

https://ostrich.work/ - NOSTR jobs board

NOSTR tools

https://nostr.band/ - Powerful search tool

https://nostr.wine/ - Powerful, but centralised paid relay

https://npub.pro/ - Website creation tool

https://nostr.build/ - Media and file storage

https://relay.tools/ - Build and curate your own relay

https://creatr.nostr.wine/subscriptions/new-user - Creator tools

List of NOSTR apps:

https://nostrapps.com/