Zero to Marketing - Short case studies that help you get better at marketing
APPlyzer - Professional rankings & keywords for app developers, marketers and publishers.
The Creative Marketer - Techniques & tools for copywriters, marketers, and creatives
Segment Sources - Load CRM, billing, and other cloud data to your Warehouse
Marketer Crew - Bite-size marketing lessons in your inbox
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.