Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Invision - Prototyping and collaboration for design teams
Mockup Generator - Create attractive product screenshots with just a few clicks
shotsnapp - Create beautiful device mockup presentation
Craftwork - A collection of User Interface resources made by Craftwork
Simple Mockups - Minimalistic devices mockup pack for Sketch & Photoshop