Documentation at https://melpa.org/#/calc-at-point

This package adds custom units to the units table in Emacs Calc by fetching exchange rates backends.

Calculator is an application for performing simple arithmetic. It is the default calculator application in the Pantheon desktop.

This library allows you to typeset ZX-calculus directly in LaTeX. It comes with many pre-built wire shapes, a highly customizable node style (with multiple flavours for putting labels inside or outside nodes), and a debugging mode to avoid getting lost in big diagrams.

The calculation environment formats reasoned calculations, also called calculational proofs. The package allows steps and expressions to be numbered (by LaTeX equation numbers, obeying the LaTeX \label command to refer to these numbers), and a step doesn't take vertical space if its hint is empty. An expression in a calculation can be given a comment; it is placed at the side opposite to the equation numbers. Calculations are allowed inside hints although numbering and commenting is then disabled.

Documentation at https://melpa.org/#/calc-prog-utils

This package provides an interface to the LaTeX3 floating point unit, mainly used for PSTricks related packages to allow math expressions at LaTeX level.

This package inserts inline items and menus for classic calculators (Numworks, Casio, Texas instruments, HP).

This plugin is a calculator for the Xfce4 panel. It supports common mathematical operators (+, -, *, /, ^) with usual precedence rules, and the following functions and common constants.

Documentation at https://melpa.org/#/literate-calc-mode

This library provides literate programming for Calc. There is both a major and a minor mode. The major mode does some basic syntax highlighting, while the minor mode only evaluates all Calc statements while typing. In particular, the minor mode works quite well with Org or Markdown modes, or other markup language major modes.

The bundle shows the construction of PSTricks macros to draw Riemann sums of an integral and to draw the vector field of an ordinary differential equation. The results are illustrated in a fragment of lecture notes.