SimpleX Chat is an instant messenger that is decentralized and doesn’t depend on any unique identifiers such as phone numbers or usernames. Users of SimpleX Chat can scan a QR code or click an invite link to participate in group conversations.
-privacyguides.org
It’s clearly proving to be the most innovative technology when it comes to decentralized communication, in my opinion.
For a while, it was only CLI and not even listen on the project’s main page - it was only linked on its Github. But now there is a GUI in several forms and it is listed on the main page, so kind of interested where it all goes.