Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Nintex - Cloud-based digital workflow management automation platform
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
ProcessMaker - ProcessMaker is an easy to use BPM and workflow software solution. It is used to design, automate, and deploy business processes of any kind.
Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.