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!
Steghide - Steghide is a steganography program that is able to hide data in various kinds of image- and...
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Openstego - OpenStego is a tool implemented in Java for generic steganography, with support for password-based...
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
QuickStego - With the progress of community, information transmission becomes quicker and more effortless.
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.