Unsplash Wallpapers for Mac (Official) - Curated, HD desktop background photos from Unsplash.
Sigil - Sigil is a multi-platform WYSIWYG ebook editor. It is designed to edit books in ePub format.
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Vellum - Free beautiful hand-curated wallpapers for the iPhone
Wallpaper Wizard - Wow-worthy backgrounds for Mac
Pressbooks - Create books: print and ebooks