IE7

> For anyone who is interested Microsoft have released an IE7 Readiness
> toolkit for web developers which can be downloaded from
>
click here

mailers

I have just found this little site: manbuild

It seems like a nice tool for designers to create html emails without the hassle of sending them out themselves.

Web Tracker Tools

Find the oversize of your webpage and how long it will take to render. All of these tools are not 100% accurate as some of them don't take into consideration the css images.

web analyze

speed checker

To find out for sure what images IE loads, you could a tool like Fiddler to monitor the page download and see exactly what’s being downloaded. Fiddler only works with IE
fiddler

For Firefox users the Tamper Data extension Tamper