Screen Guru - Take clean screenshots of any website
Promomatic - Easily create beautiful app store assets
Screenzy - A simple screenshot beautifier
AppLaunchpad - Create free beautiful screenshots for App store/Google play
Screely - Screely instantly generates dribbble-ready images. Simply upload your screenshot and we'll do the rest.
DaVinci Apps - Сreate customized screenshots for your app in just 3 steps