Six Sigma Calculator is described as 'A simple Six Sigma Calculator Firefox and Opera Add-on to calculate the DPM value'. There are more than 10 alternatives to Six Sigma Calculator for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and BSD. The best alternative is R (programming language), which is both free and Open Source. Other great apps like Six Sigma Calculator are PSPP (Free, Open Source), IBM SPSS Statistics (Paid), STATISTICA (Paid) and SOFA Statistics (Free, Open Source).
PSPP is a free software application for analysis of sampled data. It has a graphical user interface and conventional command line interface. It is written in C, uses GNU Scientific Library for its mathematical routines, and plotutils for generating graphs.
The IBM SPSS software platform offers advanced statistical analysis, a vast library of machine-learning algorithms, text analysis, open-source extensibility, integration with big data and seamless deployment into applications.
SOFA Statistics is an open-source statistical package, with an emphasis on ease of use, learn as you go, and beautiful output. The name stands for Statistics Open For All. It has a graphical user interface and can connect directly to MySQL, SQLite, MS Access, and MS SQL Server.
MonteCarlito is a free Excel-add-in to do Monte-Carlo-simulations. Apart from these it can also do statistical analysis like mean, median, standard error, variance, skewness, kurtosis. It can create histograms. The code is open source.
Statwing was built by and for analysts, so you can clean data, explore relationships, and create charts in minutes instead of hours. Simply upload your spreadsheet or dataset, then select the relationships you want to explore.