Nomad Project - Easily deploy applications at any scale.
RunDeck - RunDeck is an open source automation service with a web console, command line tools and a WebAPI.
Caylent - Fully managed Docker Swarm in your own cloud.
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
Ansible for DevOps - Server and configuration management for humans
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.