Qalculate! is a multi-purpose cross-platform desktop calculator. It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (GTK+ and CLI).
Version 2.2.1 includes bug fixes and minor feature enhancements.
Download the source code here:
qalculate-gtk-2.2.1.tar.gz
Download the source code of libqalculate version 2.2.1 here:
libqalculate-2.2.1.tar.gz
Download the installer for Windows here:
qalculate-2.2.1.msi
A binary snap package, with all dependencies included, is available for those using a slow-moving GNU/Linux distribution (install with the command "sudo snap install qalculate").
For more information visit the website at http://qalculate.github.io/.