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.
Soda PDF 3D Reader - Read any PDF document like a book using our patent pending 3D technology!
Fomalhaut2 - A comic viewer for macOS.
ComiXed - ComiXed seeks to be the ultimate digital comic book management system.