RevOps - Building blocks for better sales agreements

Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.

MicroAcquire - A free & anonymous startup acquisition marketplace

Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.

Massdriver - Massdriver makes DevOps effortless, allowing engineers to quickly deploy secure, production-ready infrastructure using a simple diagramming interface.

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.