A useful usability list

http://line25.com/articles/10-usability-crimes-you-really-shouldnt-commit

Also worth a look

http://line25.com/articles/10-html-tag-crimes-you-really-shouldnt-commit

Closure Compiler, aiming to shrink and performance-optimize your JS and alert you to problems with it.
http://closure-compiler.appspot.com/home

A useful tool from Micosoft that allows side by side testing of Internet Explorer versions 6, 7, and 8

http://www.microsoft.com/downloads/details.aspx?FamilyID=8e6ac106-525d-45d0-84db-dccff3fae677&displaylang=en

This site has some great design patterns used by lots of the most popular websites.

http://www.welie.com/patterns/index.php

Mark B. mentioned this at our Dev staff meeting. 

I recently ran across a very useful tool "WyaWidget - Widget Creator" that allows you to create a widget and place it onto your Google Personalized Homepage (Also, Netvibes & Pageflakes). I'm sure there are other tools out there that are similar but this one caught my attention because it is completely web-based and simple, some of the interface is a bit rough but it is totally usable. Not only can you build a quick widget directly from you Google homepage but they also have a web based tool that allows you to build web apps, modify any you created through Google and also change your data schema ( Similar to BOA ).  

Here are a few great AJAX examples that can easily take the place of popup windows.

GreyBox

ThickBox

LeightBox

All are based off the original LightBox technique

Usefual design pattern infomation used by Yahoo.com

Yahoo Design Patters

If anyone is interesed here is a free MS Outlook RSS reader add-in that I have been using.

RSS Popper

Say you wanted to have a fixed width layout website, and the content floated in the middle of the screen. You can use the following CSS command:

#content

{

width: 700px;

margin: 0 auto;