The Twilio C# Library by Billy Coover is a C# wrapper for the Twilio REST API. Twilio provides a simple hosted API and markup language for businesses to quickly build scalable, reliable and advanced voice and SMS communications applications.
AWS has launched CloudTrail: a resource tracking and user visibility API. CloudTrail records API calls made to AWS accounts and returns log files. CloudTrail records calls across AWS services. Whether you need to track calls made to the AWS Management Console, AWS SDKs, command line tools, Cloud-Formation, or other AWS services; CloudTrail's call history helps increase security analysis, resource change analysis, and compliance.