Software Product Management Stack - Resources & tools to help you manage your software product
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
Notes with pictures - Notes with pictures is one of the best mobile apps that enable you to write notes and add images, voices, videos, and attach documents to your records.
Product Management Exercises - A repository of product manager job interview exercises
Notepad by Splend Apps - Notepad by Splend Apps is one of the best mobile apps that enables you to create a to-do list and notes.