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!
Collagerator - Create amazing photo collages in few mouse clicks. Ready for download for Mac OS X and Windows.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Snap2IMG - Snap2IMG generates contact sheets (also known as thumbnail sheets or image index) for folders on...
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
PhotoMix - Affordable photography in the Gatineau/Ottawa region!
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.