Here's another great design tool...  ColorPix

Have you ever wanted to get the Hex code off that beautiful image... without having to open up Photoshop?

ColorPix is a really quick and easy tool for grabbing colors off images or any other application or web page.  The download is a simple .exe file and when you run it you get a little box that will pick up the color data of any item on your screen.  Just move your mouse around the screen and the box will display the pixel location, RGB, HEX, HSB, and CMYK values.  Click the "Magnifier" button to get a zoom-in of the area surrounding your mouse.

It's not every day that you get an error from a Google App, but it  does happen on occasion.  I think it is interesting to see how applications handle their error pages.  In the screenshot below, Google makes sure that every user understands what has happened by providing a message in many different languages.  You should be able to access this page directly by going to this link... http://www.google.com/googlecalendar/unavailable.html

I must say that I love cool and simple tools.  

The following blog at Six Revisions has a great list of useful tools.

12 Useful Web Tools for Designers