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!
UX Metrics - UX Metrics offers free tools to research, test, and refine any information architecture.
Userbrain - Easy, fast, and affordable user testing for websites and prototypes.
airfocus - The first modular product management platform: Discover, learn, plan and deliver - your way.
UXtweak - Online user testing and usability platform
UserBit - A full-stack qualitative research platform for UX & product teams.