Clever Ruler is a powerful measuring tool for Windows. It's simple and easy to use. It can be transparent and rotatable. It supports multi-monitor. You can move,measure in your second monitor. The features are: transparent, can slant and rotate. It contains pixels, cm, inch, custom unit. You can also make the ruler not show any unit. It allows you adjust the width and length of ruler. It also includes magnifier, supports defining hot key, and supports scale.

• JR Screen Ruler Pro 3.1
  The JR Screen Ruler is a great tool that allows you to accurately measure anything on your screen. This is especially useful when measuring graphics, web page browser sizes or...

• Screen Ruler Professional 6.0.0.1
  Screen Ruler Pro was made for one single purpose -- to be the best screen ruler out there

• Clever Ruler 2.
  Clever Ruler is a powerful measuring tool for Windows

• Desktop Ruler 3.28
  A Virtual ruler - very useful with spreadsheets, graphic utilities and programming tools

• Ruler By George! 1.3
  Ruler By George! is a handy virtual ruler ready to be dragged around on your computer screen; it's very useful for measuring graphic objects in pixels, inches, and centimeters

• Universal Desktop Ruler 3.4
  It allows you to measure not only a straight line distance but any curved distance on the Screen