ESBCalc - Freeware Calculator

ESBCalc is a Windows Scientific Calculator that is absolutely free to use. The calculator provides a variety of features such as Infix Notation, Brackets, Scientific Functions, Memory, Optional Paper Trail, Result History List, Customisation of the Colours and Fonts used, Customisation of the Hints, and more.

The calculator comes with a range of functions including Trigonometric, Hyperbolic, Logarithmic - Base 10, Base 2 and Natural - and many more. Additionally, ESBCalc supports Prefix Function, so that you can enter Log (1.3) as log 1.3 instead of 1.3 log, which is also available if you prefer that behaviour.

One of the best features of the calculator is the ability to display the current state of Precedence, Prefix Functions, etc at startup to help avoid confusion while using the calculator.

ESBCalc looks best with Windows XP / Vista / 7 in 800x600 (or better) and 32-bit color. However, you can still use the calculator on other operating systems.

ESBCalc also offers a Portable Version, which means you can use the calculator on-the-go without worrying about installation.

Overall, ESBCalc is a powerful scientific calculator with advanced features and customization options that make it a great tool for students, researchers, and professionals alike.