Pipedream - Integration platform for developers
Terraform - Tool for building, changing, and versioning infrastructure safely and efficiently.
Multi-Step Zaps by Zapier - The easiest way to build powerful workflows with your apps
RunDeck - RunDeck is an open source automation service with a web console, command line tools and a WebAPI.
Dexter - A platform that makes connecting third-party APIs easy
Packer - Packer is an open-source software for creating identical machine images from a single source configuration.