CDisplay Ex - CDisplay Ex is the most used comic book reader.
VIZ Manga - VIZ Manga is a multi-platform app that serves as an excellent resource for fulfilling the needs of comic lovers.
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
Manga Storm CBR - Manga Storm CBR is the best-in-class app for accessing and reading DRM-Free comics in formats like PDF/CBR/CBZ on the iPad/iPhone.
Tachiyomi - A free and open source manga reader for Android.
Komik Reader - Komik Reader is a free to use digital comic application by Kaycha and specially designed for Android and iOS devices.