Apache Cocoon

Apache Cocoon is a web development framework built around the concepts of separation of concerns (making sure people can interact and collaborate on a project, without stepping on each other toes) and component-based web development. Cocoon implements these concepts around the notion of «component pipelines», each component on the pipeline specializing on a particular operation. This makes it possible to use a «building block» approach for web solutions, hooking together components into pipelines without any required programming.