The Foreman
The Foreman is definitively the biggest open source software related to Puppet, and not directly developed by Puppet Labs.
The project was started by Ohad Levy, who now works at Red Hat and leads its development, supported by a great team of internal employees and community members.
The Foreman can work as a Puppet ENC and reporting tool, it presents an alternative to the inventory system, and most of all, it can manage the whole lifecycle of the system, from provisioning, to configuration and dismissal.
Some of its features have been quite ahead of their time.
For example, the foreman() function made possible what is now done with the puppetdbquery module.
It allows direct query of all the data gathered by the Foreman: facts, nodes classification, and Puppet run reports.
Let's look at this example, which assigns to the variable $web_servers the list of hosts that belong to the web hostgroup that have reported successfully in the last hour:
$web_servers = foreman("hosts"...
