Metadata++ - Homepage of Metadata++, free, intuitive and powerful EXIF, IPTC, XMP, ICC, GPS viewer/editor.
CThruView Transparent Image Viewer - CThruView is a free transparent image viewer that allows mouse clicks to go through the image.
ExifToolGUI - Graphical user interface to https://alternativeto.
LayerX - An intuitive app to display transparent images on screen.
PhotoME - PhotoME is a powerful tool to show and edit the meta data of image files.
Osiva - Osiva" is an acronym that stands for "Overly Simple Image Viewing