iOS Jetpack - Beautiful easy-to-use screenshot templates for App Store
Placeit - Generate realistic product shots in seconds
App Screenshot Maker - Design marketing screenshots for your app in minutes
iPhone Screenshot Maker - Add iPhone frame on your screenshots or Cut status bar.
DaVinci Apps - Сreate customized screenshots for your app in just 3 steps
PicApp - PicApp was created by the awesome team from AppDemoStore.com to help you show your app to the world.