Google Photos

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FastStone Image Viewer

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Apple Photos is an app native to the macOS and iOS eco system. The application comes pre-installed with all Macintosh computers, iPhones and iPads. With Apple Photos you can manage, store and browse all your photos in a neat application.

Store your files in the cloud with Dropbox and use them across all your devices or share them with friends. Dropbox is a cloud backup services that can be used to store your files online in a secure fashion. With Dropbox you receive 2GB of free storage space when your register, you also get 500MB extra storage for every friend you refer. If you want more you have to opt for a paid subscription.

IrfanView is a commercial image viewer and editor that can be used to orginize and convert images for Microsoft Windows. The application can handle video and audio files, while providing basic image editing capabilities. IrfanView is free for non-commercial use, while commercial use requires payment.

A versatile and powerful photo viewer, image management, image resize developed by XnSoft. The XnView MP image viewer is a free software for macOS, Linux and Windows. The software consist of a photo viewer and a photo editor. With the photo viewer you can view browse photos in thumbnail, fullscreen and filmstrip view and compare images and manage EXIF, IPTC, XMP meta data. The photo editor can be used to resize, rotate and crop photos or adjust brightness, contrast and color while applying filters and effects to images. 

ImageGlass is a lightweight, versatile image viewing application that is designed for viewing images in a clean and intuitive working environment. It share many similarities with Windows Photo Viewer that shipped with Windows 7 and Windows Vista. ImageGlass provides tools that can be used to conver images to different formats, invluding BMP, EMF, EXIF, GIF, ICO, JPG, PNG, TIFF, WMV and BaseString.