AppLaunchpad - Create free beautiful screenshots for App store/Google play
Smartmockups - Create product screenshots with just a few clicks, for free
MockuPhone - Easily wrap app screenshots in devices
Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Placeit - Generate realistic product shots in seconds
DaVinci Apps - Сreate customized screenshots for your app in just 3 steps