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.

Apache Commons Text is a library focused on algorithms working on strings.

This is a part of the Apache Commons 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.

This package provides annotations for the findbugs package. It provides packages in the javax.annotations namespace.

This package provides the Java development kit OpenJDK.

Java Message Service (JMS) API is used to send messages messages between two or more clients. It is a messaging standard that allows application components to create, send, receive, and read messages.

jsch-agent-proxy is a proxy program to OpenSSH's ssh-agent and Pageant included Putty. It will be easily integrated into JSch, and users will be allowed to use these programs for authentication.

This package provides the Java development kit OpenJDK.

Pax Exam creates OSGi bundles for testing purposes. It lets the user take control of the OSGi framework, the test framework (e.g. JUnit) and the system under test at the same time.

Modello is a framework for code generation from a simple model.

Modello generates code from a simple model format: based on a plugin architecture, various types of code and descriptors can be generated from the single model, including Java POJOs, XML/JSON/YAML marshallers/unmarshallers, XSD and documentation.

JHDF5 is a high-level API in Java for reading and writing HDF5 files, building on the libraries provided by the HDF Group.

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

Microemulator is a Java 2 Micro Edition (J2ME) CLDC/MIDP Emulator. It demonstrates MIDlet based applications in web browser applet and can be run as a standalone java application.

PowerMock is a framework that extends other mock libraries such as EasyMock with more powerful capabilities. PowerMock uses a custom classloader and bytecode manipulation to enable mocking of static methods, constructors, final classes and methods, private methods, removal of static initializers and more. By using a custom classloader no changes need to be done to the IDE or continuous integration servers which simplifies adoption.

Commons Math is a library of lightweight, self-contained mathematics and statistics components addressing the most common problems not available in the Java programming language or Commons Lang.

Metadata-extractor is a straightforward Java library for reading metadata from image files. It is able to read metadata in Exif, IPTC, XMP, ICC and more formats.

The Byte Code Engineering Library (Apache Commons BCEL) is intended to give users a convenient way to analyze, create, and manipulate (binary) Java class files. Classes are represented by objects which contain all the symbolic information of the given class: methods, fields and byte code instructions, in particular.

Such objects can be read from an existing file, be transformed by a program (e.g. a class loader at run-time) and written to a file again. An even more interesting application is the creation of classes from scratch at run-time. The Byte Code Engineering Library (BCEL) may be also useful if you want to learn about the Java Virtual Machine (JVM) and the format of Java .class files.

This package provides the Java development kit OpenJDK.

Adobe's Extensible Metadata Platform (XMP) is a labeling technology that allows you to embed data about a file, known as metadata, into the file itself. The XMP Toolkit for Java is based on the C++ XMPCore library and the API is similar.

Plexus-default-container is Plexus' inversion-of-control (IoC) container. It is composed of its public API and its default implementation.

This package provides the Java development kit OpenJDK built with the IcedTea build harness.

QDox is a high speed, small footprint parser for extracting class/interface/method definitions from source files complete with JavaDoc @tags. It is designed to be used by active code generators or documentation tools.

OSGi, for Open Services Gateway initiative framework, is a module system and service platform for the Java programming language. This package contains the names for the attributes and directives for a service namespace.

LZ4 - Java is a Java port of the popular lz4 compression algorithms and xxHash hashing algorithm.