Although the java.net package provides basic functionality for accessing resources via HTTP, it doesn't provide the full flexibility or functionality needed by many applications. HttpClient seeks to fill this void by providing an efficient, up-to-date, and feature-rich package implementing the client side of the most recent HTTP standards and recommendations.

ASM is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or dynamically generate classes, directly in binary form. The provided common transformations and analysis algorithms allow easily assembling custom complex transformations and code analysis tools.

The Xerces2 Java parser is the reference implementation of XNI, the Xerces Native Interface, and also a fully conforming XML Schema processor.

Xerces2-J supports the following standards and APIs:

• eXtensible Markup Language (XML) 1.0 Second Edition Recommendation

• Namespaces in XML Recommendation

• Document Object Model (DOM) Level 2 Core, Events, and Traversal and Range Recommendations

• Simple API for XML (SAX) 2.0.1 Core and Extension

• Java APIs for XML Processing (JAXP) 1.2.01

• XML Schema 1.0 Structures and Datatypes Recommendations

• Experimental implementation of the Document Object Model (DOM) Level 3 Core and Load/Save Working Drafts

• Provides a partial implementation of the XML Inclusions (XInclude) W3C Candidate Recommendation

Xerces is now able to parse documents written according to the XML 1.1 Candidate Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Candidate Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save API's are in use.

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees.

This package provides the native library for jansi, a small Java library that allows you to use ANSI escape sequences to format your console output.

Xbean-reflect provides very flexible ways to create objects and graphs of objects for dependency injection frameworks

Binding/provider for NOP, an implementation that silently discards all logging messages.

OpenJFX is a client application platform for desktop, mobile and embedded systems built on Java. Its goal is to produce a modern, efficient, and fully featured toolkit for developing rich client applications. This package contains graphics-related classes for the OpenJFX distribution.

TestNG is a testing framework inspired from JUnit and NUnit but introducing some new functionalities that make it more powerful and easier to use.

JMock is a library that supports test-driven development of Java code with mock objects. Mock objects help you design and test the interactions between the objects in your programs.

The jMock library

• makes it quick and easy to define mock objects

• lets you precisely specify the interactions between your objects, reducing the brittleness of your tests

• plugs into your favourite test framework

• is easy to extend.

OSGi, for Open Services Gateway initiative framework, is a module system and service platform for the Java programming language. This package contains the OSGi annotation module, providing additional services to help dynamic components.

This package provides the Java development kit OpenJDK.

This package provides an implementation of the OSGi Core specification.

Dataformat backends are used to support format alternatives to JSON, supported by default. This is done by sub-classing Jackson core abstractions.

This package is a Maven plugin to generate Plexus descriptors from source tags and class annotations.

This package provides the core libraries of the Eclipse Java development tools.

Jeromq provides the java bindings for 0MQ.

ANTLR, ANother Tool for Language Recognition, (formerly PCCTS) is a language tool that provides a framework for constructing recognizers, compilers, and translators from grammatical descriptions containing Java, C#, C++, or Python actions. ANTLR provides excellent support for tree construction, tree walking, and translation.

Jakarta Annotations defines a collection of annotations representing common semantic concepts that enable a declarative style of programming that applies across a variety of Java technologies.

This package contains the base build API for maven and a default implementation of it. This API is about scanning files in a project and determining what files need to be rebuilt.

This package contains the runtime library used with generated sources by ANTLR.

Armed Bear Common Lisp (ABCL) is a full implementation of the Common Lisp language featuring both an interpreter and a compiler, running in the JVM. It supports JSR-223 (Java scripting API): it can be a scripting engine in any Java application. Additionally, it can be used to implement (parts of) the application using Java to Lisp integration APIs.

Plexus Compiler is a Plexus component to use different compilers through a uniform API. This component chooses the compiler implementation to use in a project.

The Jakarta-ORO Java classes are a set of text-processing Java classes that provide Perl5 compatible regular expressions, AWK-like regular expressions, glob expressions, and utility classes for performing substitutions, splits, filtering filenames, etc. This library is the successor of the OROMatcher, AwkTools, PerlTools, and TextTools libraries originally from ORO, Inc.