
Description: Periodica is a free periodic table app for Windows, Mac and Linux. It includes detailed elemental data, electron configurations, orbital diagrams, and a quiz mode to test your knowledge.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Kalzium is an interactive periodic table of elements and isotope database for Linux desktop environments like KDE Plasma. It offers details on chemical elements and can calculate properties like molecular mass.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API