Calculius is a scientific calculator application for Windows, designed for people who need more flexibility than the standard Windows calculator.

Features: Draw graphs, with support for multiple plots in a single graph (ideal for solving equations) and saving graphs as JPEG. Evaluates entire lines at once. Supports complex numbers. All standard logarithmic and trigonometric functions are built-in. Define and call your own functions and variables in a simple and intuitive manner. Supports Greek letters. Solve quadratic equations with ease.