
Description: PDF Rider is a PDF viewing, editing, and annotation software for Windows. It allows users to view, create, edit, sign, and annotate PDF documents. Some key features include tabbed PDF browsing, commenting tools, form filling, digital signatures, and optical character recognition.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Kdan PDF Reader is a free PDF viewer and editor for Windows, Mac and Linux. It allows you to view, annotate, and collaborate on PDF documents. Key features include tabbed viewing, annotation tools, form filling, encryption/decryption, and cloud storage integration.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API