Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.

UserVoice - UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.

ProdCamp - An all-in-one tool for User feedback managment, public roadmap, feature voting board, changelog.

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

productboard - Beautiful and powerful product management.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.