XMLJ is a Java XML Editor and validator project.
EasyML serialization library, to and from XML, similar to Gson
X3D is the open-standard format for 3D graphics scenes on the Web.
eXist-db is a feature rich Open Source native XML database
Simulatoralive's Java libraries and programs
NO LONGER MAINTAINED
EXI implementations in Java and C#
A documentation and report generator for systems biological models
Framework for search and display of heterogenous document collections.
Create XML and JSON data services from any data source
Develop quickly & easily Eclipse 4 RCP Application in JEE/JSE context
CSV to XML converter
XML bindings and a GUI for creating and editing XBMC Scrapers