TTCalc is a mathematical calculator. It has a nice user interface, trigonometric functions, inverse trigonometric functions, hyperbolic functions, logical operators, logarithms, functions for converting between degrees and radians and so on. Additionally the program allows the user to define his own variables and functions. Calculations are performed by using big floating point numbers.

Calcute: free, compact, capable tape calculator. This expression evaluator processes complex expressions like -ln(1+2) * 3% + sin(4 5\6)^7 and allows exact rational values like 2 1\3 instead of 2.3333... Compact single-line mode or flexible multi-line editor to edit past work, recalculate, cut and paste on the tape, save to file, restore. Select font, button size. Show/hide buttons. Number bases: binary, octal, hexadecimal. Group digits. Help.

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.