Sicyon is all-in-one scientific calculator for every researcher and engineer. The core of Sicyon is an expression (VBScript/JScript) calculator with features as: estimate a function using variables, user-defined functions and Sicyon objects; multi-plot/tabulate a function; solve 1-6 equations, min, max and definite integral of 2D/3D function; fit a function; sophisticated units converter; constants database ; matrix oper;plugin tools.

DesktopCalc is an enhanced, easy-to-use and powerful scientific calculator with an expression editor, printing operation, result history list and integrated help. Desktop calculator gives students, teachers, scientists and engineers the power to find values for even the most complex equation set.

HEXelon MAX - free scientific calculator, converter units, currency.

ESBCalc Pro is an Enhanced Windows Scientific Calculator with Infix Processing, Exponential Notation, Brackets, Scientific Functions, Memory, Optional Paper Trail, Printing, Result History List, Integrated Help and more. Functions include Trigonometric, Hyperbolic, Logarithmic - Base 10, Base 2, Natural - Random Number and many more. Also includes expression editing and custom constants. Register only once for life of product.

ESBCalc is a Freeware Windows Scientific Calculator with Infix Notation, Brackets, Scientific Functions, Memory, Optional Paper Trail, Result History List, Customisation of the Colours/Fonts used, Customisation of the Hints, and more. Functions include Trigonometric, Hyperbolic, Logarithmic - Base 10, Base 2 and Natural - and many more. Looks best with Windows XP in 800x600 (or better) and 32-bit colour. Now with improved Large Font Support.

PG Calculator is a powerfull scientific calculator and an excellent replacement for standard calculator. It ofers full customizable user inteface and looks like real calculator on user desktop.
PG Calculator works in Algebraic and RPN modes. It works with real and complex numbers, units of measure, allows vectors manipulations. Up to 120 recognized units of measure, built-in unit converter. Time Value of Money Solver, commonly used constatants.

The Dovada student calculator is ideal for use in the school, home, office or engineering and scientific research centers, anywhere scientific calculator or graphic calculator information is continually used or required,
The Dovada student calculator has hundreds of science, astronomy, physics data and mathematical formulae built in and can be easily accessed and used in calculations. No longer do you have to search the text books for that common formula or data.

Numero is a calculator program that does the order of operations, so you can type in the whole expression at once instead of just one number at a time. It has about everything that you would expect to see on a scientific calculator. Also, in addition to the text box that you enter the expression into, Numero has a text box that displays all of the expressions and answers that you have already calculated. The interface is also customizable.

Calculator.NET is an enhanced version of the standard calculator in Microsoft Windows. It uses RPN (Reverse Polish Notation), which is used by many pocket calculators, e.g. from HP. If you have used a HP 11/28/32/42/48, or any other RPN calculator, you will feel right at home. Some of the enhancements included: RPN, extended function set, and customizable user interface. This program is completely free.

tApCalc SciFi is a handy Scientific calculator for Pocket PC. It provides a simulated paper tape that allows users to record calculations and save them for future reference. Paper tape simulation has many advantages. You can start a calculation and continue adding new calculations till you have entered all data, you can edit wrong data in the calculation without re-entering all data again, you can recalculate the calculations recorded and edited.

The value suffixes is one of the most interesting features of The Calculator.
So, if you need to enter a 4 000 000, just type 4M. That's all! Need to calculate the cosine of 20 degrees? (By default, The Calculator works with radians) Type cos(20g) and get the result.