userthink - Get useful landing page feedback. Increase conversions.
Software Product Management Stack - Resources & tools to help you manage your software product
Smartlook - Qualitative analytics for websites and mobile apps Start understanding the 'whys' of your users' behaviors with clear, visual insights. With session recordings and event tracking, you get the complete picture.
The Product Management guide - A book on how to create and ship products that people love
Inspectlet - Google Analytics tells you what, Inspectlet tells you why.
Product Management Exercises - A repository of product manager job interview exercises