Viso - Beautiful minimal image viewer for MacOS
New Google Photos - Shared suggestions, libraries and photo books
LightGallery - A modern, electron and nodejs based image viewer for Mac, Windows and Linux.
digiKam - Professional Photo Management with the Power of Open Source
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.
Pixave - The ultimate image organizer for the Mac.