cPanel - With its first-class support and rich feature set, cPanel & WHM has been the web hosting industry's most reliable, intuitive control panel since 1997.
Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
ServerPilot.io - Centralized hosting control panel for Wordpress and PHP web sites
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Webmin - Webmin is a web-based interface for system administration for Unix.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.