UI Movement - The best UI design inspiration, daily
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.
Design Hunt - Curated design inspiration for everyone
Ultimate eBook Creator - Ultimate eBook Creator is a dedicated eBook creator for creating the books for the Amazon Kindle.
Page Flows - User flow design inspiration for mobile & desktop
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.