X3D is the open-standard format for 3D graphics scenes on the Web.
XMLJ is a Java XML Editor and validator project.
EasyML serialization library, to and from XML, similar to Gson
A Java library to write and read graphml diagrams
eXist-db is a feature rich Open Source native XML database
Simulatoralive's Java libraries and programs
A Java implementation of XProc: An XML Pipeline Language
NO LONGER MAINTAINED
File validation and characterization
Convert Cobol Data Files to/From Xml
A general programming utility library in Java