Smartmockups - Create stunning product mockups, easily and online.
Craftwork - A collection of User Interface resources made by Craftwork
Mock - Instantly create video mockups from screen recordings
Icons8 - Free app for Mac & Windows already containing 39,800 icons. Allows to search and import icons…
DaVinci Apps - Сreate customized screenshots for your app in just 3 steps
Previewed - Beautiful mockups & graphics for your next app