Uizard - Design made easy – powered by AI
MockMagic - A free, easy-to-use device mockup generator
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Dimmy.Club - Device mockup generator for your website and app screenshots
InVision Studio for UI Designers - Free video course on InVision Studio
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.