Lookback - See how people really use your app
UserTesting.com - Usability testing has never been easier. Get videos of real people speaking their thoughts as they use websites, mobile apps, prototypes and more!
Ethnio - Ethnio lets businesses create a screener and schedule participants for research.
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
UserCrowd - UserCrowd helps you to collect feedback and ideas from your users.
Userbrain - Easy, fast, and affordable user testing for websites and prototypes.