The files are provided “as-is” under the MIT License. They are meant to be used as a source of inspiration, as they do contain a few minor dependencies on internal code – for instance used to translate labels to human readable strings in different languages.
In other words this is a snapshot of of the XSLTs that are all free to use, but we offer no guarantee that they are actually useful. Likewise we cannot be held accountable for errors or faults contained within these files.
Update 2009-03-17: Added some more XSLTs to the Sandbox page. These are XSLTs developed in a project for public libraries using Summa.