
Description: PSPP is a free, open source alternative to IBM SPSS Statistics. It is designed to provide statistical analysis capabilities similar to SPSS with an intuitive graphical user interface. PSPP supports common statistical procedures like descriptive statistics, hypothesis testing, regression, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Six Sigma Calculator is a free web-based tool that allows users to perform common Six Sigma statistical calculations. It includes functions for process capability analysis, statistical power analysis, DPMO/yield rate calculations, sample size estimation, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API