
Description: qpdfview is a tabbed document viewer for PDF and other file formats like PostScript, DejaVu, XPS, DjVu and others. It aims to be lightweight and configurable. Key features include zooming, printing, annotations and searching.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PDF-XChange Editor is a PDF editor and viewer software for Windows. It allows users to view, edit, annotate, OCR and sign PDF documents. Key features include editing text and images, adding comments, signing documents electronically, and converting PDFs to other formats.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API