XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
calibre - Ebook manager, viewer & converter
IrfanView - IrfanView ... one of the most popular viewers worldwide.
NeeView - Display two images simultaneously
Imgseek - imgSeek is a collection of free open source projects for searching a collection of images using...
FBReader - FBReader is an e-book reader for various platforms. Features: