Suggestions for Calc

The following packages have something in common with the package Calc. The packages are ordered in decreasing similarity.

Package multicol: Intermix single and multiple columns
Package tabularx: Tabulars with adjustable-width columns
Package trig: Simple trigonometric functions
Package bxcalc: Extend the functionality of the calc package
Package didec: Fixed-point arithmetic with two decimal places
Package bnumexpr: Extends eTeX’s \numexpr...\relax construct to big integers
Package bigintcalc: Integer calculations on very large numbers
Package intcalc: Expandable arithmetic operations with integers
Package fp: Fixed point arithmetic
Package zeckendorf: Knuth Fibonacci multiplication, Zeckendorf and Bergman representations of big integers
Package array: Extending the array and tabular environments
Package afterpage: Execute command after the next page break
Package bm: Access bold symbols in maths mode
Package dcolumn: Align on the decimal point of numbers in tabular columns
Package delarray: Delimiters for arrays
Package fontsmpl: Print a sample of a font
Package ftnright: Footnotes in two column documents in one column only
Package hhline: Better horizontal lines in tabulars and arrays
Package indentfirst: Indent first paragraph after section header
Package longtable: Allow tables to flow over page boundaries
Package layout: View the layout of a document
Package rawfonts: Low level font compatibility mode for LaTeX
Package somedefs: Save loading all of another package
Package shellesc: Unified shell escape interface for LaTeX
Package trace: Make sensible use of TeX tracing in LaTeX
Package theorem: Manipulate theorem environments
Package varioref: Intelligent page references
Package verbatim: Reimplementation of and extensions to LaTeX verbatim
Package xspace: Define commands that appear not to eat spaces
Package enumerate: Lists with redefinable labels
Package xlop: Calculates and displays arithmetic operations