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RunDeck - RunDeck is an open source automation service with a web console, command line tools and a WebAPI.
Pipedream - Integration platform for developers
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
Parabola - Automate manual processes without spreadsheets or code
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.