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.
File upload component for Java servlets
The FileUpload component provides a simple yet flexible means of adding support for multipart file upload functionality to servlets and web applications.
Apache Lucene is a high-performance, full-featured text search engine library
Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform.
Apache Scout is an implementation of the JSR 93 (JAXR).
Apache Scout is an implementation of the JSR 93 (JAXR). It provides an implementation to access UDDI registries (particularly Apache jUDDI) in a standard way.