Smartmockups - Create stunning product mockups, easily and online.
Mediamodifier - Create beautiful designs and product mockups in seconds.
AppLaunchpad - Create free beautiful screenshots for App store/Google play
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Placeit - Generate realistic product shots in seconds
iOS Jetpack - Beautiful easy-to-use screenshot templates for App Store