Maze - Beautiful & actionable analytics for InVision prototypes
Responsive Viewer - View multiple screen dimensions in one view
Conversion Crimes - Get insights on how users behave on your site or software and how they feel about it. Remove friction and increase motivation to buy.
Responsinator - Designed to test responsive websites on different devices.
Koncept - Usability testing, interactive prototypes & metrics
Responsive Website Test - Test any website on desktop, mobile, and tablet