Tachiyomi - A free and open source manga reader for Android.
Issuu - Issuu is the leading digital publishing platform delivering exceptional reading experiences of magazines, catalogs, and newspapers.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Scribd - Unlimited books, audiobooks & comics. Unparalleled discovery. Any device. $8.99/month
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
Magzter - Magzter is the world's largest digital magazine newsstand with over 10,000+ magazines in its catalogue. Read them anytime and anywhere on iPad, iPhone, Android devices and the web.