SetEXIFData - GUI for exiftool with many other features.
Fragment - A powerful image viewing suite with advanced metadata info
IrfanView - IrfanView ... one of the most popular viewers worldwide.
ExifToolGUI - Graphical user interface to https://alternativeto.
ImageGlass - You can use Image to view your digital images and photos of many different formats.
Metadata++ - Homepage of Metadata++, free, intuitive and powerful EXIF, IPTC, XMP, ICC, GPS viewer/editor.