XStream is a simple library to serialize Java objects to XML and back again.

Xsdlib contains an implementation of sun.com.msv, an XML validator.

Jaxen is an XPath library written in Java. It is adaptable to many different object models, including DOM, XOM, dom4j, and JDOM. It is also possible to write adapters that treat non-XML trees such as compiled Java byte code or Java beans as XML, thus enabling you to query these trees with XPath too.

Xml Pull Parser (in short XPP) is a streaming pull XML parser and should be used when there is a need to process quickly and efficiently all input elements (for example in SOAP processors). This package is a stable XmlPull parsing engine that is based on ideas from XPP and in particular XPP2 but completely revised and rewritten to take the best advantage of JIT JVMs.

MXParser is a fork of xpp3_min 1.1.7 containing only the parser with merged changes of the Plexus fork. It is an implementation of the XMLPULL V1 API (parser only).

Xml Pull Parser (in short XPP) is a streaming pull XML parser and should be used when there is a need to process quickly and efficiently all input elements (for example in SOAP processors). This package is a stable XmlPull parsing engine that is based on ideas from XPP and in particular XPP2 but completely revised and rewritten to take the best advantage of JIT JVMs.

The resolver class implements the full semantics of OASIS Technical Resolution 9401:1997 (Amendment 2 to TR 9401) catalogs and the 06 Aug 2001 Committee Specification of OASIS XML Catalogs.

It also includes a framework of classes designed to read catalog files in a number of formats:

• The plain-text flavor described by TR9401.

• The XCatalog XML format defined by John Cowan

• The XML Catalog format defined by the OASIS Entity Resolution Technical Committee.

Xml Pull Parser (in short XPP) is a streaming pull XML parser and should be used when there is a need to process quickly and efficiently all input elements (for example in SOAP processors). This package is in maintenance mode.

kXML is a small XML pull parser, specially designed for constrained environments such as Applets, Personal Java or devices compliant with the Mobile Information Device Profile (MIDP).

XOM is a new XML Object Model for processing XML with Java that strives for correctness and simplicity.

This package provides the reference implementation of the Streaming API for XML (StAX). It is used for streaming XML data to and from a Java application. It provides a standard pull parser interface.

Dom4j is a flexible XML framework for Java. DOM4J works with DOM, SAX, XPath, and XSLT. It can parse large XML documents with very low memory footprint.

XMLUnit provides you with the tools to verify the XML you emit is the one you want to create. It provides helpers to validate against an XML Schema, assert the values of XPath queries or compare XML documents against expected outcomes.

Plexus-cipher contains a component to deal with encryption and decryption.

Commons-IO contains utility classes, stream implementations, file filters and endian classes.

The JavaMail API provides a platform-independent and protocol-independent framework to build mail and messaging applications.

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.

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 namespace with contracts.

jsch-agent-proxy is a proxy program to OpenSSH's ssh-agent and Pageant included in Putty. This component contains an implementation of USocketFactory using JNA (Java Native Access).

This package provides the HttpCore benchmarking tool. It is an Apache AB clone based on HttpCore.

Eclipse LSP4J provides Java bindings for the Language Server Protocol and the Debug Adapter Protocol. This package is a common definition intended to be inherited by other packages.

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.

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.

The Commons Lang components contains a set of Java classes that provide helper methods for standard Java classes, especially those found in the java.lang package in the Sun JDK. The following classes are included:

• StringUtils - Helper for java.lang.String.

• CharSetUtils - Methods for dealing with CharSets, which are sets of characters such as [a-z] and [abcdez].

• RandomStringUtils - Helper for creating randomised strings.

• NumberUtils - Helper for java.lang.Number and its subclasses.

• NumberRange - A range of numbers with an upper and lower bound.

• ObjectUtils - Helper for java.lang.Object.

• SerializationUtils - Helper for serializing objects.

• SystemUtils - Utility class defining the Java system properties.

• NestedException package - A sub-package for the creation of nested exceptions.

• Enum package - A sub-package for the creation of enumerated types.

• Builder package - A sub-package for the creation of equals, hashCode, compareTo and toString methods.

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