The new release of Signal has support for encrypting and sending arbitrary files. That's a very big deal: for many users it has long been an unsolved problem to securely share documents or recordings, and now it's as easy and sending a text. Update out now for Desktop, iOS, and Android!
@DivineOmega I haven't heard anything about that
@xor All I know of is @bcrypt 's work on Signal Muon. https://github.com/diracdeltas/signal-muon