Jewish Encyclopedia: Goliath 
Overview of the Philistine giant from the traditional Jewish perspective, including rabbinic commentary.
http://www.jewishencyclopedia.com/view.jsp?artid=336&letter=GGoliath
Profile of the Philistine warrior from a joint Lutheran and Catholic bible study project.
http://www.aboutbibleprophecy.com/p149.htm
David's Slaying Goliath In Single Combat
Chapter by the first-century Jewish historian Josephus.
http://www.interhack.net/projects/library/antiquities-jews/b6c9.html
