Apache Commons CLI provides a simple API for presenting, processing, and validating a Command Line Interface.

The Apache Commons IO library contains utility classes, stream implementations, file filters,

RPC framework for client and server.

RPC (Thrift) framework among servers.

A jdbc driver for a time series database, IoTDB, which uses TsFile as its storage format on disk.

Thrift is a software framework for scalable cross-language services development.

A Java DSL for synchronizing asynchronous operations

Various utilities for accessing internals of a class.

PowerMock support module for JUnit 4.x.

PowerMock API for Mockito 2.+..