
Description: Observable Notebooks is an interactive JavaScript notebook for exploratory data analysis and visualization. It allows users to create shareable notebooks that combine code, visualization, and text.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Calculist is a free, open-source calculator app for Windows. It provides standard, scientific, programmer, date calculation, and converter tools. Key features include customizable themes, hotkeys, history, and support for copying math expressions.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API