Nifty - Manage projects, work, and communications in one place.

Prowess - The simplest way to collect and leverage product feedback

Intercom on Product Management - The ultimate resource for aspiring product managers

StoriesOnBoard - StoriesOnBoard helps agile teams build better products faster. The built-in guide helps you collect and prioritize ideas, understand user requirements, gather customer feedback, and validate feature ideas with internal & external stakeholders.

productboard - Beautiful and powerful product management.

Roadmap - Collision avoidance for projects and people