Audiobook Maker appears to also support chapters. http://audiobookmaker.sourceforge.net/
One thing that these programs ll have in common is “Apple”, which is possibly something to do with iTunes chapter marks being an Apple format.
See also this post: https://forum.audacityteam.org/t/first-time-user-info-confirmation/26330/4
Google brings up these suggestions:
http://lodensoftware.com/chapter-and-verse/
http://www.audiobookcreator.de/en/
among many others.