The OS XML project is by the people at news:alt.os.development and it contains a collection of documents written by various OS developers around the world.
html5media is a DITA-OT plugin and authoring UI for media insertion
XML playlists provide a means of storage for media metadata.
There are two zipped files to download. One contains the base code; the other contains sample media files. Click "Browse All Files" to find both.
code2web is a toolkit for converting source code (Java,JavaScript,XML,JSP,SQL and more) to HTML with a wide array of features, including CSS customization, outline generation, automatic documentation liking, selective highlighting and more.