Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.
digiKam - Professional Photo Management with the Power of Open Source
Dark Room - A quick, powerful photo editor that gives you control
Photos on macOS - Photos keeps your images organized and accessible. Rediscover favorite shots with Memories. Access them on your devices with iCloud Photos.
Nizo - A better iPhone camera for shooting film
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!