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

Castor EDC - Castor offers you a user-friendly and fully featured application for electronic data collection.

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

OpenClinica - OpenClinica is an open source clinical trials software.

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.

OnCore - OnCore Enterprise Research system supports efficient processes at academic medical centers, cancer centers, and health care systems.