UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
digiKam - Professional Photo Management with the Power of Open Source
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Photos on macOS - Photos keeps your images organized and accessible. Rediscover favorite shots with Memories. Access them on your devices with iCloud Photos.
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!