Scribd - Unlimited books, audiobooks & comics. Unparalleled discovery. Any device. $8.99/month
IrfanView - IrfanView ... one of the most popular viewers worldwide.
FlippingBook - FlippingBook changes the way you present your documents
Fragment - A powerful image viewing suite with advanced metadata info
Joomag - Joomag is the all-in-one digital publishing platform empowering businesses large and small to create, distribute, track, and monetize their interactive content.
ImageGlass - You can use Image to view your digital images and photos of many different formats.