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.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Python Fabric - Fabric is a Python library and command-line tool for streamlining the use of SSH for application...
Terraform - Tool for building, changing, and versioning infrastructure safely and efficiently.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.