Abstract - A secure, version-controlled hub for your design files
digiKam - Professional Photo Management with the Power of Open Source
Zeplin - Collaboration app for UI designers & frontend developers
Photos on macOS - Photos keeps your images organized and accessible. Rediscover favorite shots with Memories. Access them on your devices with iCloud Photos.
ActiveWords - Auto correct on steroids
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!