weta-dfs is a distributed file system. It is designed to be fail-safe through replications of files, fast and easy to install, platform independent, and to have fast recovery from crashes. It consists of Data Node Servers and one Meta Data Server and a java.io.File-like client API.
polliwog is a Java-based Web server log file analyzer. It creates a Web site of statistics and information about your Web site. It provides you with detailed knowledge of what your visitors did while visiting your site. It provides information on human visitors (including daily statistics), searches, search engines, site areas, pages, visit paths, linking sites, and more. It is highly configurable and user-extensible.
Compass is a Java framework which makes it simple to map your Java object model into a search engine. It is built on top of the Lucene search engine. Compass features declarative mapping technology OSEM (similar to O/R database mapping), transaction management, Google-like query syntax, externalization of common metadata, and much much more.
Swing has lot of components built in, but still some are missing. This project provides the developer community with these missing components, inspired from modern user interfaces. It provides a PropertySheet component, a collapsible task pane (JTaskPane), a button bar (JButtonBar), a font chooser (JFontChooser), an Outlook Bar (JOutlookBar), a Tip Of The Day dialog (JTipOfTheDay), and a directory chooser (JDirectoryChooser).
Nennius is an object-oriented application engine. Although initially intended to be a time and expense tracking tool, it has since been improved upon to support a wide array of data types and relationships. It offers the ability to run multiple, concurrent Web applications from a single Nennius engine. Each Web application is fully customizable and can easily be modified to fit almost any existing business model.
Ammentos is a lightweight persistence framework for JDK 5. It does not require any installation nor configuration; just put a jar file into your classpath and start writing code. It is designed so that your persistence code will be dramatically short and so that you won't have to spend a lot of time to learn how to use it. It is about 72Kb large and it does not require any external library except for your database JDBC driver. You can use it in desktop applications or in server-based environments.