Intercom on Product Management - The ultimate resource for aspiring product managers
Better Notes - Simple notes app that ties notes together with #hashtags
Product School - The global leader in product management training
ClevNote - ClevNote is an amazing mobile application that helps you to write the daily memos on your smartphone.
The Product Management guide - A book on how to create and ship products that people love
Keep My Notes - Keep My Notes is a fantastic mobile application that allows you to create notes and organizes your notes in the folder efficiently.