Ansible - Radically simple configuration-management, application deployment, task-execution, and multi-node orchestration engine
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Puppet Enterprise - Get started with Puppet Enterprise, or upgrade or expand.
n8n.io - Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.