XnView MP stands for Multi Platform = it is available for Windows, Linux and MacOS. It is a continuation of the older XnView Classic. In my opinion it is a great alternative to Windows photos app or any Linux image viewer that comes preinstalled. I even think it is an alternative to IrfanView. It is really fast and simple to use, supports more than 500 image formats, has built in folder browser, image converter, editor... AND MORE!
IrfanView - IrfanView ... one of the most popular viewers worldwide.
JPEG-Repair Toolkit - JPEG-Repair Toolkit is a utility for repairing corrupt photos.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
JPEGsnoop - JPEGsnoop is a detailed JPEG image decoder and analysis tool.
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.
AnyFound Photo Recovery - Download AnyFound Photo Recovery Free Edition - An application that can recover deleted, lost and corrupted photos free.