Python Fabric - Fabric is a Python library and command-line tool for streamlining the use of SSH for application...
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
kadeploy - Kadeploy - scalable, efficient and reliable deployment tool for clusters and Grid computing
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.
(R)?ex - (R)?ex - manage all your boxes from a central point - Datacenter Automation and Configuration...
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.