Qalculate! is a cross-platform, multi-purpose calculator application. It is designed to be powerful yet easy to use, and it is capable of performing many different types of calculations. It has a wide variety of features including algebraic, symbolic, numeric, and graphical calculations. It also includes a wide range of features for unit conversion, statistical analysis, plotting, numerical integration, and more. Qalculate! can be used for a wide range of tasks from basic arithmetic to scientific and engineering calculations. It is also available as a web app, allowing users to access Qalculate! from any computer with an internet connection.
Discontinued The program is no longer updated. The latest version, 4.0, released in January 2011, can still be downloaded from the official website.