
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: MJ PDF Reader is a free, lightweight PDF viewer for Windows. It allows you to view, print, and annotate PDF documents. Key features include tabbed browsing, search, bookmarks, and basic annotation tools.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API