Sigil - Sigil is a multi-platform WYSIWYG ebook editor. It is designed to edit books in ePub format.
Splashify - Beautiful desktop wallpapers for Mac and Windows
Vellum - Free beautiful hand-curated wallpapers for the iPhone
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
Pressbooks - Create books: print and ebooks
Wallcat - Enjoy a new, beautiful wallpaper, every day.