Clever Ruler Cost: $19 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions Clever Ruler: Clever Ruler is a powerful measuring tool that can be transparent and rotate any number of degrees. Also, it can show scale line. It is easy to measure a slant line. Now, it has a magnifier and it supports hot keys and all kinds of units (pixels, inches, custom units, and so on).