Large data centre operators and cloud providers often use odd proprietary software to manage their installations. Rackspace has taken the slightly unusual step of releasing the OpenCenter software it uses to run its own centres as open source software, letting anyone use the package if they wish.
There’s undoubtedly a commercial motivation for Rackspace — sites using its software are more likely to use its centres if they decide on a hybrid solution — but it’s an interesting move nonetheless. You can use the package to deploy Ubuntu, RHEL or CentOS. Hit the site to learn more or download the software.