Harry Whitfield
Planimeter
FreeMeasure Areas of Closed Curves Accurately
WindowsPlanimeter II
FreePlanimeter II: Accurate On-Screen Area Measurement Widget
WindowsDMXdeCoder
FreeEffortless DMX512 Channel Conversion Widget
WindowsNetCalc - an RF Impedance Calculator
FreeComprehensive RF Impedance Calculation Tool
WindowsPixel Scale
FreePixel Scale Delivers Versatile Desktop Rulings and Area Measurement
WindowsSunrise Calculator
FreeDesktop Calculator for Sun and Moon Times
WindowsDMXconverter
FreeDMXconverter: Simplify Your DMX Channel Calculations
WindowsDrawDemo
FreeInteractive Drawing Screensaver for Windows
Windows