I've ried out using nostr with:

Iris

Snort

Nostur

Damus

Primal

Nostrudel

Satellite

Amethyst

Mutiny

npub. cash

Minibits

Citrine

Amber

Start9 relay

nostr. build

zap. store

Zapstream

zap wiki

Shipyard

Highlighter

Iefan stuff.. plus more I can't remember