vCard4J is a complete toolkit to manipulate vCards (RFC 2426) in Java. It contains a parser to read vCard files. It also includes a compiler to extend the library. vCard types are defined in a XML file, making it easy to add custom types. It also contains XSLTs to convert the internal DOM structure into vCards 3.0, xHTML, or other formats.
xcb-proto contains descriptions of the X Window System core protocol and selected extensions in an XML-based data format. They are used by the X C Binding (XCB) library to generate much of its code, but you can also use these descriptions for other purposes, such as decoding the X protocol or building X Window System bindings for other languages.
The goal of xmlportlet is to provide a base portlet to serve as a simple mechanism for transforming XML data into the view for your portlet application. This base portlet will be JSR-168 compliant, and will relieve you from developing the basic boilerplate logic needed to transform XML using XSLT into HTML.