The Product Management guide - A book on how to create and ship products that people love
Mirro - An all-in-one team performance management solution made easy
Intercom on Product Management - The ultimate resource for aspiring product managers
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
Charte - Free online interactive charts for non-techies