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.
Anakia uses Apache Velocity to generate documents based on XML source files.
Anakia is an XML transformation tool that uses JDOM and Velocity to transform XML documents into the format of your choice. It provides an alternative to using Ant's <style> task and XSL to process XML files.
Apache Chemistry provides open source implementations of the Content Management Interoperability Services (CMIS) specification.
Apache Chemistry provides open source implementations of the Content Management Interoperability Services (CMIS) specification. Libraries are available for Java, Python, PHP and .NET.
DeltaSpike is a collection of portable Extensions for CDI Containers
Apache DeltaSpike is a portable JSR-299 CDI (Contexts and Dependency Injection for Java) Extension library which contains lots of useful tools and helpers which are missing in the CDI core spec. DeltaSpike is not a CDI-container itself, but a portable Extension library which can run on all CDI-containers! DeltaSpike is tested and runs on many Java EE Servers like Apache TomEE, Red Hat JBoss Application Server, JBoss Wildfly, Oracle WebLogic, Oracle Glassfish, IBM WebSphere, and also on simple Servlet containers like Apache Tomcat or Jetty in combination with either JBoss Weld or Apache OpenWebBeans.