galculator is a GTK 2 based scientific calculator supporting algebraic mode, RPN, and a formula entry mode. Features include arithmetic operations plus precedence handling, full keypad support, trigonometric functions, power, square root, natural and common logarithm, constants (e, PI), and inverse and hyperbolic functions. It supports different number bases (decimal, hexadecimal, octal, and binary) and angle bases (radiant, degree, and grad) along with basic, scientific, formula entry and paper mode.