EPUB readers

Adobe Digital Editions
Adobe Digital Editions is ebook reader software from Adobe Systems built using Adobe Flash.

Aldiko
Aldiko is an e-book reader application for the Android operating system.

Blio
Blio is a free of charge e-reader software platform created by Ray Kurzweil that was unveiled at the Consumer Electronics Show in Las Vegas in early January 2010.

Calibre (software)
calibre is free and open source e-book computer software that organizes, saves and manages e-books, supporting a variety of formats.

EPUB
EPUB is a free and open e-book standard by the International Digital Publishing Forum.

EPUBReader
EPUBReader is a freeware browser extension that displays EPUB e-books in the Firefox web browser.

FBReader
FBReader is a free and open source e-book reader for GNU/Linux, Microsoft Windows, and other platforms.

iBooks
iBooks is an e-book application by Apple Inc. for their iOS operating system and devices.

Lexcycle Stanza
Lexcycle Stanza is a freeware program for reading eBooks, digital newspapers, and other digital publications.

Okular
Okular is the document viewer for KDE SC 4.

Sigil (application)
Sigil is an open-source editor for EPUB e-books developed by Strahinja Marković since 2009.