Both OCPSoft (author of PrettyFaces) and Hibernate use DocBook to publish documentation. The entire site is (re) generated using Maven through the Maven jDocBook plugin . The styles (which may include CSS styles, fonts, and images) applied to the documentation are custom-made, but at least for Hibernate, it seems to be available in the SVN Repository .
NB . You may need to check the license before you can use the files in your projects.
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