digiKam - Professional Photo Management with the Power of Open Source
Exif Pilot - Exif Pilot is a Free EXIF Editor that allows you to manipulate META data within image files.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Metadata++ - Homepage of Metadata++, free, intuitive and powerful EXIF, IPTC, XMP, ICC, GPS viewer/editor.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
ExifToolGUI - Graphical user interface to https://alternativeto.