Deployer PHP
Deployer is a free and open source deployment tool.
...See the wiki for information on system requirements, installation & upgrade instructions and answers to common questions. Deploys applications to multiple servers accessible via SSH. Clones your project's git repository. Runs arbitrary bash commands. Gracefully handles failure in any of these steps. Keeps a number of previous deployments. Monitors that cronjobs are running. Allows deployments to be triggered via a webhook.