NeeView - Display two images simultaneously
Mcomix - MComix is an user-friendly, customizable image viewer.
Soda PDF 3D Reader - Read any PDF document like a book using our patent pending 3D technology!
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
ACBF Viewer - Comic book reader.
Komikku - An online/offline manga reader for GNOME developed with the aim of being used on the Librem 5 phone.