Software Product Management Stack - Resources & tools to help you manage your software product
Cydia - An alternative app store for jailbroken devices.
The Product Management guide - A book on how to create and ship products that people love
AppRecs - AppRecs sorts through reviews in the App Store and automatically helps you filter out inauthentic results.
Product Management Exercises - A repository of product manager job interview exercises
Fnd - Browse Apple App Store and iTunes on the Web