Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
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.
XL Deploy - Enterprise-scale Application Release Automation for any environment
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine