Darktable - darktable is an open source photography workflow application and raw developer.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
Invision - Prototyping and collaboration for design teams
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
Sketch - Professional digital design for Mac.