Apache Ant is a Java library and command-line tool whose mission is to drive processes described in build files as targets and extension points dependent upon each other. The main known usage of Ant is the build of Java applications.

scala-library-bootstrapped

ScalaTest is a flexible and popular testing tool in the Scala ecosystem. It can be used to test Scala, Scala.js, Scala Native, Dotty (Scala 3), and Java code.

TestNG is a testing framework inspired from JUnit and NUnit but introducing some new functionalities that make it more powerful and easier to use. It supports test configured by annotations, data-driven testing, parametric tests, etc.

The `hibernate-core` module has been relocated to the `org.hibernate.orm` group

FreeMarker is a "template engine"; a generic tool to generate text output based on templates.

Spock is a testing and specification framework for Java and Groovy applications. What makes it stand out from the crowd is its beautiful and highly expressive specification language.

Apache Hadoop Common

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard

Apache Lucene (module: core)

Groovy: A powerful, dynamic language for the JVM