EstaPlus is a free statistical software -freeware- focused on descriptive statistics developed by Alejandro Vergara Massa that can analyze and plot using data distributed in one-dimensional or two-dimensional variables, in discreet or continuous mode.

The following are its main features:

• Lots of data formats
  • One-dimensional or two-dimensional variables
  • Discreet (grouped in intervals) or continuous variables
  • Quantitative and qualitative data
  • Introduction of tabular or not tabular data

• Storage features
  • Save and print data tables
  • Save and print analysis reports
  • Import tables from spreadsheets (using Tabulator Delimited Spreadsheet format)

• Edition features
  • Automatic error checking during data introduction
  • Automatic filling of data tables
  • Full control of the edition of data tables

• Detailed analysis of data table
  • Measures of central tendency
  • Characteristic of dispersion
  • Characteristic of form
  • Identification of outliers
  • Functional dependence
  • Analysis of regression
  • Measures of statistical dependence
  • Analysis of percentiles
  • Analysis of moments

• Plots
  • Box and whisker
  • Spread

• Other features
  • On line help that includes definitions of statistical formulas
  • Probability wizard
  • Windows and Linux PC editions