It is an online file conversion service, covering a wide range of different image, document, music, video and compression formats. Free for files up to 100MB. Read more »
Calibre is a free and open source e-book library management application. It can convert from a huge number of formats to a huge number of formats. The conversion engine has lots of powerful features. It can rescale all font sizes, detect/create book structure, insert the book metadata, etc. Read more »
Mac OS X, Windows 7, Windows Vista, Linux, Windows XP.
Converts CBR and CBZ archives in to EPUB for eBook readers. Automatically cleans and crops the comic pages so that they display well on eBook readers. Read more »