The Rackspace Ruby SDK is a development kit that lets developers integrate multiple different Rackspace APIs with their applications, using Ruby. Some of the Rackspace services that this SDK supports include Cloud Files, Cloud Block Storage, and Cloud DNS.
Need to make sure your cloud is up and running? If you like pretty charts of that uptime, Nimsoft has got you covered. The company also has a not quite as pretty Nimsoft Cloud Monitor API that allows developers to integrate the tools for monitoring cloud performance into their applications.