(I'm not neutral, but) if you're checking this list of wonderful projects, you may want to take a look at Apache Hop (https://hop.apache.org).

Apache Hop not only lets you visually build data pipelines, the platform also takes care of your entire data project life cycle.

Integration with Apache Beam allows you to run data pipelines on the native Hop engine, but also on Apache Spark, Apache Flink and Google Cloud Dataflow.

Since Hop initially started as a fork of Pentaho Data Integration, upgrading from PDI is straightforward.