I've just noticed that nostr:npub1kmwdmhuxvafg05dyap3qmy42jpwztrv9p0uvey3a8803ahlwtmnsnhxqk9 is using the Nostr icon designed by nostr:npub104fpzfgtc4h272p66uye2nhjes622x7dduk97g8re5h8gmmv2pnsqdq2a2 for contact details of projects. Cool!
This awesome icon (public domain) is available here: