ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Tachiyomi - A free and open source manga reader for Android.
Ralpha Image Resizer - High-speed image batch conversion tool
Mcomix - MComix is an user-friendly, customizable image viewer.