IrfanView - IrfanView ... one of the most popular viewers worldwide.
Photos on macOS - Photos keeps your images organized and accessible. Rediscover favorite shots with Memories. Access them on your devices with iCloud Photos.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Movavi Photo Manager - Focus on the memories, forget about managing photos
Scheduler - Scheduler – Schedule Posts for Instagram, Facebook developed and published by Scheduler Inc.
CyberLink PhotoDirector Suite - CyberLink PhotoDirector Suite is the best photo editor for creative photographers who want to create or design a stunning part.