Kalkules (obviously derived from calculus calculator) is a Free and Portable Universal Scientific Calculator created by Jardo. This freeware calculator can evaluate whole expressions, draw function graphs, calculate in four number systems, with fractions, or polynomials and more.
SpeedCrunch is a Free Portable Calculator. Simply type the expression you want to calculate using your keyboard or point and click the buttons using your mouse (and press Enter for continuation).
Day Maxi Calc (DMC) is another great Free Portable Calculator. Perform your calculations on a calculator with huge buttons!
Calcute is a Free Scientific Tape Calculator or Expression Evaluator that can be stored and run from a USB device. Calcute supports many scientific functions, like logarithms and exponents, trigonometric and hyperbolic functions, normal and inverse.
ESBCalc is a Portable and Free Scientific Calculator Software that can be run from Windows. ESBCalc supports Infix Notation, Brackets, Scientific Functions (Trigonometric, Hyperbolic, Logarithmic "Base 10, Base 2 & Natural"), Memory, Paper Trail, Result History List and more.
TTCalc Portable is a nice advanced Mathematical calculator written by Tomasz Sowa. Available in both English and Polish languages TTCalc is so simple to navigate and very easy to use.
