Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
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.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Atavist - Atavist provides a suite of publishing tools to tell stories and build websites.
Scribus - Scribus is a desktop publishing (DTP) application.
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.