AB Euro-calculator
Ab-euro is the free currency calculator for your desktop. you may convert between all euro-based and 35 foreign currencies. a quick pocket calculator is integrated. just mimimize ab-euro to a small icon in your task bar. so its always available.
http://www.ograhl.com/en/ab-euro/index.php
Advanced IP Address Calculator
Advanced ip address calculator 1.1 (free) - easy-to-use ip subnet calculator that lets you to calculate every aspect of your subnet configuration in a few mouse clicks!
http://www.radmin.com/products/utilities/ipcalculator.php
Calc98
Calc98
http://www.calculator.org/
FreeCalc
Calculator freeware with many useful functions. moffsoft freecalc is the ideal replacement for your standard windows calculator - with adjustable size, visible memory value and digit groupings, this free calculator software is a simple and intuitive tool.
http://www.moffsoft.com/freecalc.htm