The Toggle Units plugin created by Matt666 on SketchUcation.com is an essential plugin to have in your SketchUp toolbox. It allows you to switch between metric units, standard units and other fornmats while using SketchUp.
Toggle Units allows you to switch from Meters to Centimeter and Millimeters in the Decimal mode. You can also switch from Architectural, Fractional and Ingeneiry. Though many of these modes are very similar to each other.
This plugin definately is a feature that SketchUp has left out. It allows you to change all dimensions and even changes the way you can input distances for creating lines and other objects. The plugin uses the metric conversion of 0.3048 meters equals 1 foot. A drawback to this plugin is that there are no shortcut keys to toggle between. Though on the Sketchucation.com forum you can read some tips to do this.
Overall, the Toggle Units plugin created by Matt666 is a simple and easy to use plugin and should be at the top of your tool palette. At the time of this review this plugin is free and is available at Sketchucation.com. I give this plugin 5 out 5 stars.
Download Notes: Download link on the page button links to. The main (1st page) has an outdated version that did not work on my system.