PPC Gear - Instantly find where you lose money in Google Ads
Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.
AdWords Keyword Generator - Instantly generate thousands of targeted longtail keywords
Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.
Keyword Surfer - Get search volumes & keyword data directly in Google.
Zuora - Zuora creates cloud-based software on a subscription basis that enables any company in any industry to successfully launch, manage, and transform into a subscription business.