Args4j is a small Java class library that makes it easy to parse command line options/arguments

Core Jackson processing abstractions (aka Streaming API), implementation for JSON

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

Guava is a suite of core and expanded libraries that include

Guice is a lightweight dependency injection framework for Java 8 and above, developed by Google.

The Java-based Simple Argument Parser.

Smack core components.

Smack for Java7 (or higher).

Smack for standard XMPP connections over TCP.

Smack GUI debugger.

API for SLF4J (The Simple Logging Facade for Java) which serves as a simple facade or abstraction for various logging ...

JUnit Jupiter is the API for writing tests using JUnit 5.