Renders Java 1.1 GUIs written in AWT that do not implement custom graphics to a text console. [Open Source]

A Java library including source code for the Adept Software Development System. Packages include a Java object database, advanced file I/O, caches, session management. [Open source, Artistic License]

A surround Audio Engine using OpenAL API, supporting features of the latest audio cards. AgentAE is 100% Java and platform-independent.

Includes classfile parser and writer, reloading classloader, UNIX syslog client protocol, an asynchronously updated Map, and cache and pool framework support. [Open source, GPL]

Framework for Applets and Applications. It replaces java.applet.Applet as superclass and includes easy-to-use Internationalization support. [Commercial/Freeware]

A generic internet gaming framework in Java providing a complete client/server and peer to peer networking and messaging layer and a modular game generation toolkit with particular effort on the card games. [Open source, GPL]

Integrating the Java platform with Mozilla. Features include a bridge to XPCOM, a Java DOM API, the Open JVM Integration (OJI) facility, a Java WebClient API, Plug-ins implemented in Java, called 'Pluglets', and embedding the layout engine into Java applications - includes a demonstration browser partially written in Java. [Open Source, MPL]

Simple Java/XML rules engine suitable for personalization, workflow, and business rules. [Open Source]

Allows treating a byte array as a file. [Open Source, GPL]

An implementation of coroutines using Java 1.0 and threads - ported from a C version. [Freeware]

Provides EJB, GUI and non GUI components related to credit card data and data validation. By Keyoti Software.

Set of open source Java libraries automating or improving on existing solutions includes J2EE Scheduler, Lookup Loader, Struts Extensions. [Open source, LGPL]

Java workflow engine, Java job scheduler, and Java business process management (BPM) engine. APIs are available for Java, J2EE, XML, and Web Services. Flux can also be used without programming via its user interfaces. [Commercial]

Generic collection of Java support classes. [Open Source]

ICEbrowser (HTML component for internet browsing in Java), ICEbox (a mail component), ICEtoolkit (a GUI toolkit based on lightweight AWT components) and ICEssl (a module provides support for secure networking over the Internet, and full support for both SSL 2.0 and SSL 3.0 protocols). [Commercial, trial versions]

Consists of four Java components that provide streaming HTML-to-PDF conversion, streaming ZIP file generation, HTTP file uploading, and emailing.

A business rule engine class library.

Collection of open source reusable Java components from the Apache/Jakarta community.

Customizable XML support, generic Matrix class, and automatic error calculation. [Open Source, LGPL]

Implementation of the JSR-107 JCache API. Its aim is to provide an open source alternative to commercial jcache implementations and deliver a fast distributed caching mechanism for java and j2ee. [Open source, LGPL]

Utility classes for the java collections framework. [Open source, GPL or LGPL]

Class libraries that extend JDK libraries, providing many commonly-used algorithms and data structures. By Recursion Software, Inc. [Commercial]

A general-purpose plug-in framework intended to help building scalable, extendable Java applications with low cost of maintenance. [Open source, LGPL]

This library adds a higher layer of abstraction to the standard Java print API. It has an opened architecture and simplifies the printing of complex components (e.g. tables) and reports. An interactive print preview is also included.

Clue Web Browser Components power Java applications to display HTML. HTML-XML Dual Viewer help developers to display both HTML and XML with a single Java component. [commercial]

A pure Java Subversion (SVN) client library that provides high level of control over subversion repository operations. [Open source, BSD-like]

Java class library. The main objective is to provide a cross platform, multi-language set of utilities for use with Java applications.

A platform independent Java library provides efficient in-memory datastructures for objects and primitive types, I/O streams and a bunch of related utilities. Many tools for every day tasks like file system access, event handling and string manipulation are also bundled. [Open source]

A complete re-implementation of the java.beans packages. This project builds on the deficiencies of the Sun implementation to provide developers with a set of tools that can be used in everyday practice. The JBeans project provides more support for getting and setting bean properties, type conversion, nested properties, indexed properties, and full JavaBeans. [Open source, LGPL]

Open-source java libraries, in particular GUI, speech-recognition, and XML related components.

A Java class library for credit card transaction processing. [Open source, BSD License]

Task scheduling system for Java, similar to Unix cron and at daemons. Fires events at specified times. Alarms are added dynamically in any order and can be one-shot or repetitive. [Open Source, LPGL]

Java libraries and Java Beans providing access to 3270 and 6530 mainframe hosts.

A Java class library for generating reports. It provides a flexible printing functionality for Java applications and supports output to Printers and PDF, Excel, HTML and XHTML, PlainText, XML and CSV files. [Open source, LGPL]

A class library that provides mathematical graph-theory objects and algorithms. JGraphT supports a rich gallery of graphs and is designed to be powerful, extensible and easy to use. [Open source, LGPL]

An XML-based configuration engine for Java applications. It could be used any Java application - client-side and server-side applications, Swing and web applications. [Open source, LGPL]

A Java implementation of Monkey's Audio Compression decoder. It is a Java library that decodes, converts and plays Monkey's Audio files (.MAC, .APL, .APE) in real time. JMAC doesn't need JMF. It runs under J2SE. [Open source, LGPL]

Java Application Framework for business development. [Freeware]

A binding for SDL (Simple DirectMedia Layer) written in java. Now you can use SDL and still program with Java. [Open source, LGPL]

A framework of components providing functionality for time related applications (for the moment instant, period, mediators managing temporal associations). [Open source, LGPL]

Multithreading collection that provides common wrappers and synchronized implementations. [Commercial w/ demo]

Report generator and print preview JavaBean.

Java-based object-oriented framework for interactive business applications. By APCON WPS. [Framework is commercial; other components are open source, BSD-like]

Java-based object oriented platform for MUDs and other modular, possibly distributed applications. [Open Source]

Provides pure Java utilities that enhance the functionality of Java applications, zip utilities, file search, file parsing, work queues, daily rolling logs, synchronized data types. [Freeware]

Utilities such as printf, array manipulation, console mode dialogs, file management, text, and DES crypto. [Commercial]

A pure Java library for creating and validating licenses. [Commercial]

A Java class library for deduction rules. It provides an infrastructure for defining, managing and querying rule engine bases. [Open source, LGPL]

A Java library consisting of a number of iterators, algorithms and functions, loosely inspired by the C++ Standard Template Library. [Open source, LGPL]

A Java framework for creating online multiplayer games. [Open source, GPL]

Computes the MD5 hash of arrays of bytes. Can also be used in command-line mode. [Open Source, Public Domain]

A user interface library for development of networked Java applications. It provides a terminal independent component model that can be adapted to different terminal types and user interface themes. [Open source, LGPL]

Java Naming and Directory Interface (JNDI) service provider for accessing arbitrary Java objects in a hierarchical namespace. [Open source, GPL]

A pure Java library for recognition and processing mouse gestures. [Open source, LGPL]

General purpose Java tools libraries: Lib (Objects, Strings, Files, FileFormat, Web, Tools, ZipInput); run - a Java application that runs code from a URL; jsp - Universal JSP turns JSP language into Macro; Practical XML - a very simple XML library.

Provides the following services: implementation of complete UML 1.3 physical metamodel, easy to use interfaces, event notification, undo/redo support, reflective API, XMI loading/saving. [Open Source, LGPL]

A class library providing object-oriented representations and algorithms for logic, mathematics and artificial intelligence. It comprises theorem proving, computer algebra, search and planning, as well as learning algorithms.

This package provides standardized, efficient versions of utility classes commonly encountered in concurrent Java programming. It mainly consists of implementations of a few interfaces. [Open Source, Public Domain]

Generic, extensible object-pooling library to cut down on object creation and garbage collection, thus improving performance. [Open Source, LGPL]

A cross platform audio I/O library. [Open source]

A collections framework for primitive Java types. The framework supports all primitive types and includes bridges to the standard Java Collections Framework. [Open source, LGPL]

Java utility libraries for text, IO, XML, database. Online javadocs. [Open source]

A collection of (hopefully) useful Open Source Java classes, including Syslog, JDBC Connection Pool, PAS - a lightweight application server framework, Object Pooling Framework. Also Base64 encoder/decoder, blocking queues, work queues, mutex locks utility classes. [Open source, LGPL]

An open source rule based scripting system for information integration and agents in Java, combining imperative and declarative programming. Distributed agents communicating via JMS or JADE use reaction rules in a natural syntax.

A WYSIWYG editor applet/component. Provides word processor-like features, like a spelling checker, for XHTML markup creation.

Offers libraries for the Java platform, such as dated collections, print preview, report visualization, and an OODB. [Commercial]

A collection of easy to use multi-purpose Javabeans providing commonly used methods for handling I/O, arithmetic, and general commonly used algorithms used in computer science. [Open source, BSD License]

A library to dynamically create proxy classes and instances. Features an introduction to the library, download links and some documentation. [Open source, BSD License]

An advanced printing/report generation package for Java applications and applets. The core of Style Report/Pro is a Java class/Java bean library with a powerful API. It support PDF/RTF/HTML generation, charting, grouping/summarization and high performance, high resolution printing drivers. [Commercial]

Set of Java, COM and JavaScript libraries which together can provide connectivity between all kinds of applications. [Open Source, GPL]

A meta architecture for the Java virtual machine.

Collection of useful Java classes, including an XML generator and a simple editor. [Open Source, GPL]

A Java API that facilitates development and support of multi-threaded applications.

Allows to access everything (files, streams, arrays) in same manner, and gives a clear difference between read only and read/write access, control over byte order, optimized reading over http. [Open Source, BSD]

An extendable implementation of the NetBeans Filesystems API providing transparent access to local, JAR, CVS, XML and FTP filesystems. [Open Source, MPL-like]

Offers Tempo a software component that performs job scheduling and job queuing for J2EE applications. [Commercial]

JLicense is a Java utility library for creating and validating license keys. AuthToken is Java utility library for generating and validating authentication tokens (i.e., an encrypt string). [Freeware, pay for sources]

A J2EE report engine in Adobe PDF, Word RTF, html with css, html 3.2 (no css), ascii text formats. Servlet, JSP examples with sources. [Commercial]

Provides a powerful collection of index-structures, query operators and algorithms facilitating the performance evaluation of new query processing developments. [Open Source, LGPL]