IrfanView - IrfanView ... one of the most popular viewers worldwide.
Luminance HDR - Luminance HDR is a graphical user interface (based on the Qt5 toolkit) that provides a complete...
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Photomatix Pro - Photomatix turns high contrast scene photos into stunning images, and is an indispensable tool for landscape and real estate photography.
Seer - A Windows Quick Look Tool in Qt.
easyHDR - Extend the dynamic range of images by blending digital photos and tone mapping.