SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.
Look at that SaaS - Inspiration and resources for SaaS founders
App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies
appfigures - Cross-platform app store analytics for all of your mobile apps.