XiCalc

This is a scientific calculator which evaluates a wide range of different expressions consisting of standard mathematical functions, user defined functions, constants and variables. There is a convenient definition editor for creating function and constant definitions, eliminating the need to use a special scripting language for the definition files. Included higher math functions include newton-coates integration, equation root solving, differential quotient approximation, support of long indexed sums and products (large operators in scientific notation). This functions can also be used in your own function definitions. To help the user composing a complicated expression, functions and constants are presented in convenient command palettes, to be pasted in easily.

Whats new in this version:

Version 2.1.2 has Windows 7 user interface and new integrator function