calibre - Ebook manager, viewer & converter
Blurb - Create and self-publish books, magazines & ebooks
FBReader - FBReader is an e-book reader for various platforms. Features:
CreateSpace - Publish your words, your way
NeeView - Display two images simultaneously
IngramSpark - IngramSpark is an Online publishing services provider platform that allows you to publish or print books that are in high quality, and its global distribution service enables you to post and share around the globe.