The Product Management guide - A book on how to create and ship products that people love
Intercom on Product Management - The ultimate resource for aspiring product managers
Sunsama - Calendar and scheduling for teams
userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.
Product Management Templates - 9 essential templates created by product leaders
ithinki - A simple user feedback tool for start-ups