Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
Feedback Fish - Collect feedback & make your customers happy.
Astuto - A free, open source, self-hosted customer feedback tool.
Customer Feedback Portal - Ask customers what you should build next
Helppie.me - Get feedback from your users in a different way
Incoming Feedback by Hotjar - Instant visual feedback for your website or app!