Screen Calipers Monitor is a Widgets software developed by Nico Westerdale. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Screen Calipers Monitor:

Marydown Editor: The Screen Calipers Monitor from Iconico.com provides a quick way to launch the Screen Calipers screen measurement tool. The Monitor updates with the exact distance displayed in the Screen Calipers so you'll always know what distance is being measured.

Requires Version 3.2 of the Screen Calipers available from
http://www.iconico.com/caliper.