There exist many implementations of XML parsers that create DOM. The Radiance DomProfiler parses an XML file and builds a DOM from a handful of available parsers - CRIMSON, DOM4J, JDOM, SPARTA, XOM, XERCES, XPP - to compare time taken and memory used.
...The focus is on a hybridized model that blends pattern-based and event-based
models for XML processing, as well as supporting the leading tree-based models (DOM, JDOM, dom4j, XOM, etc.).
Jaxup is an XML update engine written in Java to work against
a variety of XML based object models such as DOM,
dom4j and JDOM. It supports the xupdate standard draft and
will support other xml update standards as they become available.