Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
Feedback Tools - Curated directory of tools for getting all the feedback
UserTest.io - User testing made simple. High-quality, affordable user testing solutions from real users, here in the UK. Improve your usability!
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.
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!
Incoming Feedback by Hotjar - Instant visual feedback for your website or app!