uDig is an open source desktop application framework, built with Eclipse Rich Client (RCP) technology. The goal of uDig is to provide a complete Java solution for desktop GIS data access, editing, and viewing. It supports GeoRSS, geospatial web services and provides the framework on which complex analytical capabilities can be built, and gradually subsuming those capabilities into the main application.

uDig - User-friendly Desktop Internet GIS

Prefuse is a set of software tools for creating rich interactive data visualizations in the Java programming language. Prefuse supports a rich set of features for data modeling, visualization, and interaction. It provides optimized data structures for tables, graphs, and trees, a host of layout and visual encoding techniques, and support for animation, dynamic queries, integrated search, and database connectivity.

Prefuse - Visualization Toolkit

UMLGraph allows the declarative specification and drawing of UML class and sequence diagrams. The current features are part of an ongoing effort aiming to provide support for all types UML diagrams. Running the UmlGraph doclet on the specification will generate a Graphviz diagram specification that can be automatically processed to create Postscript, GIF, SVG, JPEG, fig, or Framemaker drawings. 

UMLGraph - Automated Drawing of UML Diagrams

JSch is a pure Java implementation of SSH2. JSch allows you to connect to an sshd server and use port forwarding, X11 forwarding, file transfer, etc., and you can integrate its functionality into your own Java programs.

JSch - Java Secure Channel

DSpace open source software is a turnkey institutional repository application. It preserves and enables easy and open access to all types of digital content including text, images, moving images, mpegs and data sets.

DSpace - Digital Asset Management

Apache Fortress the open source identity and access management built on OpenLDAP. Fortress is designed to address complex authentication, authorization and auditing needs simply and easily. It helps to ensure strict adherence to current security standards while allowing for ease of installation and ongoing maintenance. A standards-based access management system, written in Java, that provides role-based access control, delegated administration and password policy services with LDAP.

Apache Fortress - Identity and Access Management

The Grinder is a Java load testing framework that makes it easy to run a distributed test using many load injector machines. Load test anything that has a Java API. This includes common cases such as HTTP web servers, SOAP and REST web services, and application servers (CORBA, RMI, JMS, EJBs), as well as custom protocols. 

 A graphical console allows multiple load injectors to be monitored and controlled, and provides centralised script editing and distribution. Automatic management of client connections and cookies. SSL. Proxy aware. Connection throttling. 

 The Grinder can simulate web browsers and other devices that use HTTP, and HTTPS. It can be used to test Web Service, Database, RPC, POP3, SMTP, FTP, and LDAP.

The Grinder is a Java load testing framework that makes it easy to run a distributed test using many load injector machines. Load test anything that has a Java API. This includes common cases such as HTTP web servers, SOAP and REST web services, and application servers (CORBA, RMI, JMS, EJBs), as well as custom protocols.

Grinder - Java Load Testing Framework

FreeTTS is a speech synthesis system written entirely in the Java. It is based upon Flite, a small run-time speech synthesis engine developed at Carnegie Mellon University. Flite is derived from the Festival Speech Synthesis System from the University of Edinburgh and the FestVox project from Carnegie Mellon University. FreeTTS supports  a subset of the JSAPI 1.0 java speech synthesis specification.

FreeTTS - Speech Synthesizer in Java

The Lemur Project develops search engines, browser toolbars, text analysis tools, and data resources that support research and development of information retrieval and text mining software. The project is best known for its Indri search engine, Lemur Toolbar, and ClueWeb09 dataset. 

Lemur - Search Engine

dnsjava is an implementation of DNS in Java. It supports all defined record types (including the DNSSEC types), and unknown types. It can be used for queries, zone transfers, and dynamic updates. A cache is used to reduce the number of DNS queries sent.  A simple tool for doing DNS lookups, a 'dig' clone and a dynamic update client are included, as well as a simple authoritative-only server. 

dnsjava - DNS implementation in Java

JaSpell is a Java spelling checking package. It is of particular interest for developers, since it provides a set of APIs (Application Programming Interfaces) that allow one to add spelling checking to any Java Application easily. JaSpell is implemented with basis on the ternary search tree.

JaSpell - Java spelling checking package

Rebound is a java library that models spring dynamics. Rebound spring models can be used to create animations that feel natural by introducing real world physics to your application.Rebound is not a general purpose physics library; however, spring dynamics can be used to drive a wide variety of animations. The simplicity of Rebound makes it easy to integrate and use as a building block for creating more complex components like pagers, toggles, and scrollers.

Rebound - Spring Animations for Android

jPod is a PDF manipulating and rendering framework. It provides functionality to read, verify the document against the PDF specification. It also provides content stream and rendering framework. It could able to create new document and do incremental updates. 

 <A HREF="http://opensource.intarsys.de/home/en/index.php?n=JPodRenderer.HomePage" target="_blank">jPod Renderer</A>, a complete rendering implementation for AWT and SWT with lot of support for platform specific tasks. It has pluggable image conversion and font handling support.

jPod is a PDF manipulating and rendering framework. It provides functionality to read, verify the document against the PDF specification. It also provides content stream and rendering framework. It could able to create new document and do incremental updates.

jPod - PDF manipulating and rendering framework

A Java-based database connection pooling utility, supporting Time-based expiry, Statement caching, Connection validation, and easy configuration using a pool manager.

DBPool - Java Database Connection Pooling

BaseX is a light-weight, high-performance and scalable XML Database engine and XPath/XQuery 3.0 Processor, which includes full support for the W3C Update and Full Text extensions. An interactive and user-friendly GUI frontend gives you great insight into your XML documents. It is a High-performance database storage with text, attribute, full-text and path indexes.

Basex - Processing and Visualizing XML with a native XML Database

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