Cross Browser Compatibility Test:
IETester for checking browser compatibility in IE from v5.5 to v9.
Browsershots makes screenshots of your web design in different operating systems and browsers. It is a free open-source online web application providing developers a convenient way to test their website's browser compatibility in one place.
Color Scheme Designer to choose colors and compliments and create palletes on the go.
Colorcombos.com to choose from thousands of ranked palletes.
I Like your Colors to grab any websites color. Make sure you hide the source of inspiration. :P