Marguerite Su has been working on packaging AppImageKit for openSUSE http://download.opensuse.org/repositories/home:/MargueriteSu/openSUSE_Leap_42.1/x86_64/
Dirk Müller has been working on packaging AppImageKit for openSUSE https://build.opensuse.org/package/show?project=devel%3Atools%3Abuilding&package=appimagekit
Ritesh Raj Sarraf email@example.com has filed an intent to package for debian on https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854902
Do you know of any other efforts?
Also see https://github.com/probonopd/AppImageKit/issues/339