ACDSee - ACDSee is an image viewer that uses very little system resources, and it has a small, sleek size that won't take up much space on your system.
Tag That Photo - Your Photos in Your Control by Tag That Photo Software. Face Recognition, Privacy, Tagging and more.
digiKam - Professional Photo Management with the Power of Open Source
Flickr - image and video hosting website
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.