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!
Thankbox - Online group card & gift collection for teams. Like passing a card around the office but without the card.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Fountain Greetings - Handwritten cards. Curated gifts. Right at your fingertips.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
JibJab App - Add your self(ie) to hilarious animated GIFs and messages!
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.