RunDeck - RunDeck is an open source automation service with a web console, command line tools and a WebAPI.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
Pipedream - Integration platform for developers
Parabola - Automate manual processes without spreadsheets or code
Ansible for DevOps - Server and configuration management for humans