Flare.pub - video streaming

Dtan.xyz - torrent sharing

Shipyard.pub - note scheduling

Wavlake.com - music streaming

Zap.stream - live streaming

Highlighter.com - article highlighting/snipping

Yakihonne.com / habla.news - long form article publishing

wikifreedia.vercel.app - proof-of-concept of wikis on nostr

Formstr.app - surveys

Badges.page - awarding/managing user badges

Zap.cooking - recipe sharing

Listr.lol - lists of users, links, etc.

Pinstr.app - boards/collections

Nostree.me - more link lists

Shopstr.store - online marketplace

And so so many more every day.