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!
Print Studio - No hassle printing from your desktop or mobile
IrfanView - IrfanView ... one of the most popular viewers worldwide.
UnfoldPrints - UnfoldPrints is an app that allows you to make photo collages and order them to print.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
Picta Photo Print - Picta Photo Print is an app that allows you to place an order for online photo prints.
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.