There aren't as the company is actively preventing them from being created.
@kravietz I was hoping for the ability to add it to something like Pigeon or some XMPP client that would make the Signal server basically just another XMPP server (obviously a different protocol ).
@kravietz Still, a small step away from Facebook is a good step none the less... until they buy Signal.
I'm facing the same dilemmas with my "normal" friends and relatives I've just really given up, and the most advocacy I do is to recommend switching to Signal or Telegram or, with more tech-savvy people, to Matrix :)
You can bridge Signal to Matrix using its desktop app API but you still need a Signal app installed on an Android phone (or emulator) because they block any independent client implementations.
@kravietz That is not what i was hoping for. I am much less impressed with my ability to move most of my close friends and family members to Signal.