TheTool - App Store Optimization made simple and beautiful.
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.
Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.
AppFollow - AppFollow is an integrated solution that makes monitoring, analyzing, and elevating your app's reputation easy.
appfigures - Cross-platform app store analytics for all of your mobile apps.
AppMind.co - AppMind.co is an ASO (App Store Optimization) and App Marketing service.