ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.
Pushwoosh - Mobile-inspired customer engagement platform for high achievers
Tallyfy - Cloud workflow and BPM made easy
Make.com - Tool for workflow automation (Former Integromat)