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.
FastPictureViewer - A hardware-accelerated image viewer for the modern Windows platform.
Tachiyomi - A free and open source manga reader for Android.
ImageGlass - You can use Image to view your digital images and photos of many different formats.
Mcomix - MComix is an user-friendly, customizable image viewer.