Good on-screen ruler application for Windows?

I have been using Ruler from Codeplex for ages now (I removed the old link because it was considered harmful by Chrome). Very easy to use, a simple program with simple options:

• Always on top
• The vertical and horizontal measurement
• Option to show ToolTip for smaller dimensions.
• Resizable by dragging
• Can open multiple instances
• No installation required

Forked and improved on GitHub and enhanced https://github.com/andrijac/ruler

I recommend using PicPick.

It has a ruler (horizontal or vertical) with custom units, but also others very usefull tools like screencapture, colorpicker, magnifier, angular ruler and other tools.

I really like A Ruler for Windows (freeware) - why, well I wrote it! ;-)

Seriously, it: measures pixels, horizontal / vertical, maginifies your primary screen under the ruler up to 4x, has an automatic center line (which you can toggle on and off), allows you to put ticks on either long edge, you can resize by it dragging an end, comes with four skins (woodgrain, stainless steel, clear plastic see thru, yellow construction) and you can add your own skins, works across multiple screens.

Enjoy!

www.arulerforwindows.com