b-ber is both a method and an application for producing publications in a variety of formats-EPUB 3, Mobi/KF8, static website, PDF, and XML file, which can be imported into InDesign for print layouts-from a single source that consists of plain-text files and other assets. b-ber also functions as a browser-based EPUB reader, which explains the name.

K Ye
Source: triplecanopy/b-ber