Have you ever wanted to be able to visually measure a space on your website or design so you could plan an object of an appropriate size?
NRuler is a free multiplatform screen ruler and unit converter which lets you measure anything on your screen. It comes with a unit converter that lets you convert betweeen measurement units.

Main features
1. Pixels, Centimeters, Milimeters and Picas
2. Horizontal and vertical
3. Ability to always on top
4. Customizable pixels per inch
5. Mark center or mouse position on the rulers
6. Unit Converter
7. Saves your settings
8. No installation required

NRuler makes working with it easy by providing quick keyboard shortcuts. Right click on the ruler and click Help to learn how to use it.

Requirements:
* Java Runtime Environment

The license of this software is Freeware, you can free download and free use this desktop utility software.