Analyzify - Google tag manager and analytics app for your Shopify store
Coderway.net - Unlimited creative options
Shopgram - A free analyzing tool for exploring top Shopify stores
GoSquared & Slack - Traffic spikes and user notifications sent straight to Slack
BareMetrics - SaaS Analytics for Stripe
Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more