WuHoo - DIY scene generator and mockups with customizable graphics.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
NinjaMock - NinjaMock is the faster, better and funnier way of making mockups
Invision - Prototyping and collaboration for design teams
Mockup Generator by Pixeltrue - Create beautiful product mockups in just a few clicks
Sketch - Professional digital design for Mac.