Delta Chat (Email Client)

It sounds to me like once they implement Autocrypt v2, Delta Chat will be pretty competitive with Signal (and Threema I think, although I don’t know very much about that one) for 1:1 and smaller group chats. The main thing that would be missing is their take on Sealed Sender. There’s some other problems they need to work on eventually too like group management for big groups, but they’re more usability issues. It’s also had fewer serious bugs IME than SimpleX and Session.