productboard - Beautiful and powerful product management.
Userfeed - Product feedback made for Intercom
Nifty - Manage projects, work, and communications in one place.
Fider - Fider is an open source, cross platform and free to use customer feedback platform for companies...
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
ClearFlask - Open-source Product Feedback Tool with a Public Roadmap and Announcements.