Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang. The code is tested using the latest revision of the JDK for supported LTS releases: 8, 11, 17, 21 and 25 currently.

ScalaCheck is a library written in Scala and used for automated property-based testing of Scala or Java programs.

Apache Commons Compress defines an API for working with compression and archive formats. These include bzip2, gzip, pack200, LZMA, XZ, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4, Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, ...

The Commons Text library provides additions to the standard JDK text handling. It includes algorithms for string similarity and for calculating the distance between strings.

Caffeine is a high performance, near optimal caching library. It provides an in-memory cache using a Google Guava inspired API.

HikariCP is a 'zero-overhead' production ready JDBC connection pool.

Apache Hadoop Common

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

Maven plugin to download and collect license files from project dependencies.

This Plug-In generates reports based on the SpotBugs Library

Spark SQL is Apache Spark's module for working with structured data based on DataFrames.