http://www.boutell.com/newfaq/creating/guestbook.html

http://www.websitegoodies.com/tools/guestbook.php

http://www.a-free-guestbook.com/

http://www.smartgb.com/faq.php

http://www.smartgb.com/?p=newadminlogo

http://www.thefreesite.com/Webmaster_Freebies/Free_Guestbook_Services/

http://www.freecenter.com/guestbook.html

http://www.123guestbook.com/

http://www.twcbc.com/MediaLibrary/1/1/Content%20Management/Helpsite/Web%20Hosting/documents/How%20do%20I%20create%20a%20Guestbook.pdf

http://www.jimdo.com/

http://www.2createawebsite.com/enhance/free-guestbook.html

http://www.phpjunkyard.com/php-guestbook-script.php