Polargram - Print your Instagram and Facebook photos with ease
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Squared.one - Instagram friendly prints from the online designer photo lab
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
Printerest - Print Pinterest pins properly
IrfanView - IrfanView ... one of the most popular viewers worldwide.