Komikku - An online/offline manga reader for GNOME developed with the aim of being used on the Librem 5 phone.
NeeView - Display two images simultaneously
Panels - Comic Reader - Panels is a CBR/CBZ/PDF comic reader for your iPhone and iPad devices. Enjoy reading your comics in a clean and delightful interface.
ComicFlow - ComicFlow is an iOS app that allows you to read comics by opening .cbr or .
Fomalhaut2 - A comic viewer for macOS.
ACBF Viewer - Comic book reader.