
Description: TOPCAT is an interactive graphical viewer and editor for tabular data such as catalogs and tables, designed for use in astronomical research. It offers fast table rendering, flexible sorting and filtering, multiple regression models, and advanced plotting tools.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: StarCalc is a free, open-source spreadsheet program similar to Microsoft Excel. It has many of the core spreadsheet features like formulas, charts, pivot tables, and data analysis tools. StarCalc is lightweight, customizable, and available on Windows, Mac, and Linux.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API