1)   Screen Calipers 3.3
The Screen Calipers are a unique application that allows designers to measure anything on a computer screen quickly and accurately. The application resembles real-life Vernier Calipers, making the application intuitive and easier than a screen ruler.

 2)   Pixel Ruler 3.10
Pixel Ruler features horizontal and vertical orientation, dynamic mouse measurement tracking in pixels, cool design.

 3)   Perfect Screen Ruler 1.6
Perfect Screen Ruler is a graphics tool that allows you to accurately measure anything on your screen.

 4)   Atrise Golden Section 3.0.1
This program is an unique design tool for artists, designers, programmers, photographers. It allows you design using the golden section proportion visually over your preffered design software.

 5)   Cardio Calipers 3.3
The Cardio Calipers provide a fast and accurate way to measure electrocardiograms on a computer screen with pixel perfect accuracy. The Cardio Calipers are the perfect solution for EKG measurement, to measure Heart Rate, and any part of the complex.

 6)   Screen Calipers Mac Edition 3.2
The Screen Calipers are the unique on-screen measurement tool, that let you measure anything on your computer screen with ultimate accuracy. The Screen Calipers floats above any other application so you can measure anything on your screen.

 7)   Reglo 3.5
Reglo is a versatile graphics design tool including an on-screen ruler, a color picker, a magnifier, a mini-screen capture feature, and the ability to resize the windows of other applications.

 8)   WonderWebware.com Screen Ruler 3.0
This tool is designed and made for one single purpose - to help you to measure anything on your screen.

 9)   Pixel Port 1.1
Pixel Port is a magnifier, an eight-way color picker, a ruler, and a protractor. All features reside on a single compact floating palette.

 10)   GAX reloaded v1.00
GAX is a powerful application for web designers, graphic designers and everyone else who works with graphics. It contains a colorpicker, a screen ruler, and a screen capture tool.

 11)   A Ruler for Windows 1.0.5
A Ruler for Windows is a free on-screen pixel ruler for your PC. It provides you your choice between a rich woodgrain ruler, or at the touch of a button, a clear see-through plastic ruler. A Ruler for Windows is fun to learn and very easy to use.

 12)   JFDraw 1.7.0
JFDraw is a pure Java based graphics application and library package.It can help you to complete your mechanical, electronic, architectural graphs drawing applications, or even business process or workflow graphs issues.

 13)   PDF Measure It 1.06
accurate measurement of the distance and angle between two points on a PDF page

 14)   Mac PDF Measure It 1.01
Mac PDF Measure It is an Acrobat plug-in tool, it enables accurate measurement of the distance and angle between two points on a page. To measure a distance, click anywhere on a PDF page to set a reference point.