cl-pdf is another library for pdf generation. It is written in Common Lisp and it has a freebsd style license.
http://www.fractalconcept.com/asp/mQG3/sdataQvAv8kImQIvQDM==/sdataQucgleAq9b== There is also a link in order to use pdf forms with cl-pdf: http://www.cl-user.net/asp/html-docs/pdforms
