Reedsy - Reedsy is a complete book publishing platform with an elegant, collaborative online editor.
Atavist - Atavist provides a suite of publishing tools to tell stories and build websites.
Book In A Box - Book writing & publishing as a service
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.
Tablo - Apple Music for books
SQRIBBLE - Creates AMAZING eBooks & Reports In 5 MINUTES Without Typing Any Words!