When you go to
filter against XSS: test cases
CSS tidy for neatening up and compressing your css in a configurable way.
API collection at gotapi.com
tag soup for ruby Hpricot...
memory leak detector for IE drip...
web proxy (reverse proxy) charles can be used to watch requests and packets, to throttle a connection for some real world performance testing.
Dated: 03/22/2007