Clearscope - Data-driven content performance optimization platform

Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.

Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.

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.

Searchmetrics Suite - SEO Software

appfigures - Cross-platform app store analytics for all of your mobile apps.