Chef
Ansible
Jenkins
Puppet Enterprise
Travis CI
CircleCI
Codeship
Salt
b2evolution
Sitecake
ClassicPress
TYPO3
Anchor CMS
Textpattern
Flextype
ApostropheCMS
b2evolutionAnsible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
ClassicPress - The WordPress fork. No Gutenberg. Great future!
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more