Puppet Labs’ IT automation software enables system administrators to deliver the operational agility and efficiency of cloud computing at enterprise-class service levels, scaling from handfuls of nodes on-premise to tens of thousands in the cloud. Puppet powers thousands of companies, including Twitter, Yelp, eBay, Zynga, JP Morgan Chase, Bank of America, Google, Disney, Citrix, Oracle, and Viacom.

via Puppet Labs: The Leading Open Source Data Center Automation and Configuration Management Tool | Puppet Labs.