
Description: Pdf Viewer Plus is a free PDF viewer, editor and annotation tool. It allows you to view, edit, sign, and annotate PDF documents on Windows devices. Key features include tabbed PDF reading, editing text and images, adding signatures and comments, highlighting and underlining text.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: SumatraPDF is a free and open-source PDF, eBook, XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows. It is lightweight, customizable, and supports many advanced PDF features.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API