Insite - Dynamic content personalization WordPress plugin
Survicate - Collect feedback on your website and find out more about your visitors.
Feedback Fish - Collect feedback & make your customers happy.
Emojicom.io - Capture your visitors emotions
Reslant - Delight your customers with discussion boards where they can ask questions, give feedback, get updates, vote on features, and way more.
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.