
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: PDFTK Builder is an easy-to-use PDF creation and manipulation software. It allows combining, splitting, encrypting, and converting PDF files without needing Adobe Acrobat.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API