Teradata/kylo
Kylo is a data lake management software platform and framework for enabling scalable enterprise-class data lakes on big data technologies such as Teradata, Apache Spark and/or Hadoop. Kylo is licensed under Apache 2.0. Contributed by Teradata Inc.
License & maintenance
Apache-2.0 is a permissive license: free to use commercially with attribution.
Last code push 3 years ago.