Google Analytics by SumoMe - The easiest way to see your Google Analytics
Analyzify - Google tag manager and analytics app for your Shopify store
Metric.live - Real-time and advanced periodic alerts for Google Analytics.
Shopgram - A free analyzing tool for exploring top Shopify stores
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
MerchantSpring - Multi-channel analytics for Amazon, Walmart, eBay & Shopify