RunDeck - RunDeck is an open source automation service with a web console, command line tools and a WebAPI.
UserGuiding - User onboarding made easy, for less. Create product walkthroughs in a couple of clicks, without breaking the bank.
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.