Azure is a cloud computing service for building, testing, deploying, and managing applications and services through Microsoft-managed data centers.
Internet Information Services (IIS) is an extensible web server software created by Microsoft for use with the Windows NT family.
ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
Recurly provides enterprise-class subscription billing and recurring payment management for thousands of businesses worldwide.