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ePub readers and viewers

Sumatra PDF

Sumatra PDF supports viewing mobi ebooks since version 2.1. Sumatra is free, open-source and supports many other formats, like PDF, mobi, XPS, DjVu, CBR, CBZ.


FBReader is a cross-platform, open-source eBook reader that can also read ePub files.

Cool Reader

Cool Reader supports ePub and a few other formats.

EPUBReader FireFox extension

EPUBReaderis a FireFox web browser extension.


Calibre is an eBook library manager with built-in eBook viewer.

Details of ePub format

ePub is an open format defined by the Open eBook Forum of the International Digital Publishing Forum.

ePub format is a based on XHTML, XML and CSS.

ePub files usually have .epub extension.

Free ePub books

List of websites that offer free ePub/mobi eBooks for download.

Other eBook formats

A list of mobi format readers.

A list of CHM format readers.

This list was made by Krzysztof Kowalczyk