Historical Rules of Golf Pages
[ http://www.ruleshistory.com/ ]
History site that focuses on golf and how the rules and game has evolved through the ages.
Mr. Golf Etiquette
[ http://www.mrgolf.com/ ]
Offers a selection of articles on golf etiquette and rules and unofficial rules of the game.
[ http://www.pga.com ]
Find golf courses, get golf instruction or research golf clubs.
[ http://www.teetimes.net/ ]
Aims to ensure that every potential round of golf is played.