WebAssist has released Eric Meyer’s CSS Sculptor™ 3.  I have been using CSS Sculptor since it was first released in 2007, and it is a Dreamweaver extension that I wouldn’t be without. It is the perfect tool for generating standards-compliant CSS layouts.  CSS Sculptor™ 3 is $99.99 or $49.99 if you’re upgrading and it looks like a worthwhile upgrade.  The new features include a Color Manager which could be very important for someone like me who is "graphically-chalenged" and has no sense of color. According to the literature, the Color Manager allows you to change the color scheme of a CSS layout with the click of a mouse, it makes color suggestions to help ensure that a CSS design looks professional, and it allows the importing of a web page or image to sample the colors.  I’m a developer, not a designer and now, by importing a web page into Color Manager, I can copy the color schemes developed by professional designers.  If you’re a Dreamweaver user, you can visit the WebAssist site to learn more about CSS Sculptor™ 3.

A free utility that I use all the time is JR Screen Ruler. It can measure anything on your screen and display the measurement in pixels, inches, picas or centimeters.