Edge: The Web Ruler

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Edge is an on-screen ruler that supports multiple units, horizontal & vertical orientation, and looks like a native application.Ruler is a simple onscreen ruler. It runs as a packaged app, separate from any browser tab. Get the source at https://github.com/astromme/Ruler

Features:

* Support for pixels, inches, and centimeters
* Both Horizontal and Vertical rulers
* Move the ruler with your arrow keys (+ shift for 10px changes)
* resize the ruler with your arrow keys + alt (+ shift for 100px changes)
* Calibrate the ruler with your screen size
* Exists separately from any browser tab
* Easily resizable
* Settings are remembered across launches
* Always on top mode