Readymag - Readymag is a design toolkit that helps create immersive digital experiences without developers in days, not weeks.
Atavist - Atavist provides a suite of publishing tools to tell stories and build websites.
Publitas.com - Publitas helps you to drive more visitors to your online store by publishing catalogs online.
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.
MadCap Flare - Documentation for Any Audience, Language or Format
kotobee - Kotobee is a universal eBook creating and publishing software for the authors, novelist, writers, etc.