The XML-Security-C package makes heavy use of the Xalan-C and Xerces-C++ libraries from the Apache Software Foundation. The associate license can be found in the distribution in the doc/ directory.

This documentation has been created using the Apache Software Foundation's stylebook program, which formats XML books using Stylesheets and the Java versions of Xalan and Xerces.

The package also makes heavy use of the OpenSSL cryptographic libraries to provide the cryptographic foundation. The associated license can be found in the distribution in the doc/ directory.

The people at Sourceforge provide a fantastic service for the Open Source community. The XML-Security-C project is hosted on Sourceforge and makes extensive use of their facilities.