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!
Tiat - A simple and powerful image organizer 🖼️
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Snapseed - Snapseed is a photo enhancement and sharing app with a powerful suite of imaging filters and tools...
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
PhotoTime - Automatic face sorting & keywords tagging for your photos
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.