Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Mockup Generator - Create attractive product screenshots with just a few clicks
Invision - Prototyping and collaboration for design teams
Previewed - Beautiful mockups & graphics for your next app
Sketch - Professional digital design for Mac.