
Description: Hydrogen is an open-source text editor geared towards data science and machine learning. It allows users to write and run code in Python, R, and other languages interactively via kernels. Key features include integration with Jupyter notebooks, support for launching local computing sessions, a flexible interface with themes, and built-in data visualization.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Drum Pads 24 is a free virtual drum machine app for Windows, Mac and Linux. It features 24 pads you can assign drum samples and loops to and jam along. Basic but easy to use.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API