iBooks Author - iBooks Author, free from the Mac App store, allows you to create beautiful Multi-Touch textbooks — and just about any other kind of book.

UI Movement - The best UI design inspiration, daily

Mobipocket eBook Creator - Mobipocket eBook Creator is one of the easiest way to create a professional level of eBooks by simply providing some HTML and image files to your publication.

Design Hunt - Curated design inspiration for everyone

Atavist - Atavist provides a suite of publishing tools to tell stories and build websites.

UI Jar - Hand-picked design inspiration for your real life projects