Galculator
http://galculator.sourceforge.net/
Galculator is a GTK 2 based calculator with ordinary notation/reverse polish notation, a formula entry mode, different number bases (DEC, HEX, OCT, BIN) and different units of angular measure (DEG, RAD, GRAD).
[a basic calculator] galculator features two user modes: basic and scientific mode. Basic mode is intended for simple computations. Only the most important operations and functions are available in algebraic mode as well as in Reverse Polish Mode. Formula entry, available for the basic as well as for the more sophisticated scientific mode, aims to make the calculator even more user friendlier: type as you would write on a paper!
[a scientific calculator] Scientific Mode is galculator's state-of-the-art. It supports different number bases (DEC/HEX/OCT/BIN) and angle units (DEG/RAD/GRAD) and features a wide range of mathematical (basic arithmetic operations, trigonometric functions, etc), other useful functions (memory, etc) and user defined functions. Of course, algebraic mode as well as Reverse Polish Notation are available. See below for a detailed list of supported functions.
galculator's main features
- Algebraic mode, RPN (Reverse Polish Notation) and Formula Entry mode
- decimal, hexadecimal, octal and binary number base
- Radiant, degree and grad support
- arithmetic precedence
- Basic and Scientific Mode
- user defined constants
- user defined functions
- trigonometric functions
- item power, square root
- natural and common logarithm
- inverse and hyperbolic functions
- item memory functions
- logical operations
- display RPN stack
- preferences dialog/configuration file
- display modules
- i18n
- configurable variable type in HEX/BIN/OCT mode
- thousands separator