colr.org
from Diigo
Check Browser Compatibility, Cross Platform Browser Test - Browsershots
Panic - Coda - One-Window Web Development for Mac OS X
Panic - Coda - One-Window Web Development for Mac OS X
Fix My HTML
TextFixer.com - Webmaster Online HTML tools for fixing, changing and manipulating text and html.
Greatest tool for sorting CSS properties in specific order
resizeMyBrowser