Tachiyomi - A free and open source manga reader for Android.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
IrfanView - IrfanView ... one of the most popular viewers worldwide.
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
Seer - A Windows Quick Look Tool in Qt.
CDisplay Ex - CDisplay Ex is the most used comic book reader.