Komikku - An online/offline manga reader for GNOME developed with the aim of being used on the Librem 5 phone.
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
Kinoko - Load the online comic content supported by any plug-in project to provide a convenient online comic viewing experience.
Mcomix - MComix is an user-friendly, customizable image viewer.
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.
Fomalhaut2 - A comic viewer for macOS.