BitRule - BitRule is a free screen measurement tool. Simply click on two points to get their horizontal, vertical and diagonal separation, as well as the angle of the diagonal to the horizontal. Length measurements are in pixels, inches, centimeters, picas.
ColorSkate - Discover harmonious color groupings in your photographs, on your desktop, and on the internet. Or choose a color from Web-Safe, Web-Smart or Windows 24 bit color palettes. And for each color automatically generate 11 additional harmonious colors.
FontPicker - View and pick fonts using side-by-side comparison, or compare two or three variations of just one font. Experiment with alignment, colors and font sizes and style to get just the right look.