Literate Programming
http://www.cnx.org/
http://openrules.com/examples.htm
http://labs.jboss.com/portal/jbossrules
http://fit-for-rules.sourceforge.net/
IBM XJ
IBM XJ http://www.research.ibm.com/xj/
http://openrules.com/examples.htm
http://labs.jboss.com/portal/jbossrules
http://fit-for-rules.sourceforge.net/