Chef is a cloud configuration management and deployment solution that is open source. It's designed to make it easier for anybody to manage servers in the cloud or in a departmental data centre. Chef allows DevOps to spin out dozens or hundreds of server instances in less time than it takes you to read this article, rather than system administrators sweating over management applications meant for single, stand-alone servers.
Chef makes it possible for programmers and system administrators to collaborate. Chef services both communities, rather than developers developing apps and then waiting for Ops employees to figure out how to distribute the software. By providing an effective and automated workflow—a major aim of the DevOps movement—Chef transforms the process from a herky-jerky release cycle to a continuous delivery paradigm.