The ASF @ 15 - The Apache Software Foundation Celebrates 15 Years of Open Source Innovation and Community Leadership http://s.apache.org/wZr
... and cheered at ApacheCon Europe http://s.apache.org/1o4
The ASF is made up of more than 150 top level projects which cover a wide range of technologies. Chances are if you are looking for a rewarding experience in Open Source, you are going to find it here.
Web development framework: separation of concerns, component-based.
Apache Cocoon is a web development framework built around the concepts of separation of concerns (making sure people can interact and collaborate on a project, without stepping on each other toes) and component-based web development. Cocoon implements these concepts around the notion of "component pipelines", each component on the pipeline specializing on a particular operation. This makes it possible to use a "building block" approach for web solutions, hooking together components into pipelines without any required programming.
The Apache PDFBox library is an open source Java tool for working with PDF documents.
Anything To Triples (Any23) is a library, a web service and a command line tool that extracts structured data in RDF format from a variety of Web documents.
Apache Any23 is used in major Web of Data applications. It is written in Java and licensed under the Apache License v2.0. Apache Any23 can be used in various ways: * As a library in Java applications that consume structured data from the Web. * As a command-line tool for extracting and converting between the supported formats. * As online service API available at any23.org.