
Description: LiquidText is a PDF reader and annotator designed for active reading, analysis and research. It allows users to easily highlight, excerpt, organize and share passages from PDF articles and documents.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Drawboard PDF is a PDF annotation and editing software for Windows devices. It allows you to annotate, highlight, and edit PDFs with tools like a pen, highlighter, erase, type text, add shapes, insert images, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API