qalculate.github.io
Qalculate! is a multi-purpose cross-platform desktop calculator. It provides everyday tools such as currency conversion and percent calculation, along with advanced capabilities including symbolic calculations, arbitrary precision, unit conversions, and plotting. The software includes over 400 functions and 400 units, supports various number bases, and offers a user-friendly interface with Gtk, Qt, and CLI options. It is free software licensed under the GNU Public License v2 or later.
