Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
DjVuLibre - DjVuLibre: Open Source DjVu library and viewer
CDisplay Ex - CDisplay Ex is the most used comic book reader.
DjView4 - Standalone viewer for DjVu files.
Mcomix - MComix is an user-friendly, customizable image viewer.