Advize - Customer feedback analysis & customer experience automation
Incoming Feedback by Hotjar - Instant visual feedback for your website or app!
Due.work - Simplify your work, to-do's and communications
ProductBoard Customer Feedback Portal - Share feature plans and collect feedback at scale for free
Frill - A better way to collect customer feedback
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.