Here are some of the more interesting projects that I like:
Messaging:
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
https://shipyard.pub/posts – Schedule future posts
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: