
Description: Bookdown is an open-source R package that facilitates writing books and long-form content with R Markdown. It extends the functionality of R Markdown to easily generate books, reports, websites, presentations, and more with customizable layouts.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: GitBook is an open source web-based platform for writing and hosting documentation and books with Markdown. It allows teams to collaboratively edit documentation in real time and publish formatted books.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API