Open source flash charts and graphs.

Line, area, bar and pie charts.,

The Grinder is a load testing framework that makes it easy to run a distributed test using many load injector machines. Test scripts are written in Jython, and can call out to arbitrary Java code, providing support for testing a large range of network protocols....

BIRT is an open source, Eclipse-based reporting system that integrates with your application to produce compelling reports for web, PDF and other formats.

Apache Cocoon is a web development framework built around the concepts of separation of concerns and component-based web development. Cocoon is "web glue for your web application development needs". It is a glue that keeps concerns separate and allows parallel evolution of all aspects of a web application, improving development pace and reducing the chance of conflicts....

Welcome to the JAX-WS Reference Implementation Project. This is a project in the JWSDP subcommunity of the Java community on Web Services and XML at java.net.
This project develops and evolves the code base for the reference implementation of the JAX-WS specification. The current code base supports JAX-WS 2.0 but the project will track future versions of the JAX-WS specifications....

GeoTools is an open source (LGPL) Java code library which provides standards compliant methods for the manipulation of geospatial data, for example to implement Geographic Information Systems (GIS). The GeoTools library implements Open Geospatial Consortium (OGC) specifications as they are developed, in close collaboration with the GeoAPI and GeoWidgets projects....

The Graphical Editing Framework (GEF) allows developers to create a rich graphical editor from an existing application model. GEF consists of 2 plug-ins. The org.eclipse.draw2d plug-in provides a layout and rendering toolkit for displaying graphics. The developer can then take advantage of the many common operations provided in GEF and/or extend them for the specific domain. GEF employs an MVC (model-view-controller) architecture which enables simple changes to be applied to the model from the view....

HtmlUnit is a "browser for Java programs". It models HTML documents and provides an API that allows you to invoke pages, fill out forms, click links, etc... just like you do in your "normal" browser.

It has fairly good JavaScript support (which is constantly improving) and is able to work even with quite complex AJAX libraries, simulating either Firefox or Internet Explorer depending on the configuration you want to use. ...

The mission of the Arquillian project is to provide a simple test harness that developers can use to produce a broad range of integration tests for their Java applications (most likely enterprise applications). A test case may be executed within the container, deployed alongside the code under test, or by coordinating with the container, acting as a client to the deployed code....

db4o is an object database available for Java and for .NET, including CompactFramework and Mono. Features include ACID transactions, automatic class schema recognition, Native Queries, query-by-example, S.O.D.A. object querying API, callback methods, memory files, cascade-on-delete and cascade-on-update. db4o runs in embedded local mode and in multi-transactional client/server mode....