Clearbit - Clearbit provides Business Intelligence APIs
Software Product Management Stack - Resources & tools to help you manage your software product
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
The Product Management guide - A book on how to create and ship products that people love
DiscoverOrg - DiscoverOrg is an IT sales intelligence platform providing technology marketers access to data, IT org charts, and real time projects.
Product Management Exercises - A repository of product manager job interview exercises