YSlow for Firebug
http://developer.yahoo.com/yslow/

YSlow grades a website’s performance based on the best practices for high performance web sites on the Yahoo! Developer Network.

Jeffrey Kelly
http://sailwhatcom.com

Firebug
http://www.getfirebug.com/

Firebug is a browser-based web development tool for debugging, testing, and analyzing web pages.

Jeffrey Kelly
http://sailwhatcom.com

Best practices for high performance web sites
http://developer.yahoo.com/performance/rules.html

Jeffrey Kelly
http://sailwhatcom.com