Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
Chef - Automation for all of your technology. Overcome the complexity and rapidly ship your infrastructure and apps anywhere with automation.
Terraform - Tool for building, changing, and versioning infrastructure safely and efficiently.
Rancher - Open Source Platform for Running a Private Container Service
SaltStack - SaltStack event-driven automation delivers security, cloud and configuration management for a software-defined world and enterprise complexity and scale.