Flow - Stop managing projects from your inbox.
Software Product Management Stack - Resources & tools to help you manage your software product
SlimPlanner - Team scheduling, resource planning, task management
The Product Management guide - A book on how to create and ship products that people love
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.
Product Management Exercises - A repository of product manager job interview exercises