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.
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.
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.
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.
GvTags is a lightweight yet powerful tag library and template engine for the dynamic programming language Groovy. The tag library can be used to generate Web pages with powerful tag support. It can be used with the template servlet of GvTags (TagTemplateServlet) or with JavaServer Pages (JSP). The template engine can be used to generate any kind of text documents. Since it is written in Groovy and compiled to a Java class file, it can be used from Groovy as well as from Java.