Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Octopus Deploy - Octopus is a friendly deployment automation tool for .NET developers.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
XL Deploy - Enterprise-scale Application Release Automation for any environment