Mockito preconfigured inline mock maker (intermediate and to be superseeded by automatic usage in a future version)

General data-binding functionality for Jackson: works on core streaming API

The Apache Commons IO library contains utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more.

Core classes of Apache Maven to manage the building process.

The Versions Maven Plugin is used when you want to manage the versions of artifacts in a project's POM.

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.

Apache Hadoop Common

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

Jedis is a blazingly small and sane Redis java client.

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

ZooKeeper server