Marvel (Comics) API - Create awesome stuff with the world's greatest comic API
Fragment - A powerful image viewing suite with advanced metadata info
DC Universe - The DC Comics streaming service w/ original content
ImageGlass - You can use Image to view your digital images and photos of many different formats.
Comixology Unlimited - Netflix for comics and graphics novels by Amazon
IrfanView - IrfanView ... one of the most popular viewers worldwide.