The Product Management guide - A book on how to create and ship products that people love
Niko Niko - Employee Engagement
Product School - The global leader in product management training
#TrelloAnnualReport - Get some fun free stats for your team's year on Trello!
Product Management Exercises - A repository of product manager job interview exercises
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.