Features include a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface (GTK, Qt, and CLI). It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation). Qalculate! is a multi-purpose cross-platform desktop calculator. Update automatically or install from the portable app store in the Platform. And it's open source and completely free.
It's packaged in Format for easy use from any portable device and integration with the Platform. A new version of Qalculate! Portable has been released.