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

Magenticians - Magento tutorials for all kind of users.

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.

E-Commerce Stack - A curated directory of E-commerce tools & contents

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

E-commerce Checklist - Increase conversion rate and revenue of your ecommerce store