dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
Fragment - A powerful image viewing suite with advanced metadata info
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
IrfanView - IrfanView ... one of the most popular viewers worldwide.
FreeCommander - FreeCommander is an easy-to-use alternative to the standard windows file manager. The program helps you with daily work in Windows. Here you can find all the necessary functions to manage your data stock.
ImageGlass - You can use Image to view your digital images and photos of many different formats.