I don't understand how Guardian were unable to obtain a license to use Signal/Axolotl in Chatsecure. The libraries on Github are GPL3, is there some missing IP I'm not aware of?

Also it saddens me that LibreSignal is effectively dead now, along with any future third-party clients. I think forking the Signal server and (later) adding federation could spark a community of free and secure messenger apps for the 21st century.

Even if that means starting with an empty user base. After all, most of my contacts with Signal only ever use it to contact me, it wouldn't be difficult to convince them to change app.