
Description: A document viewer is software that allows you to open, view, and print documents in various file formats like PDFs, Word docs, Excel sheets, PowerPoint presentations etc. It provides features to navigate through pages, search text, insert comments, fill forms etc.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Altarsoft PDF Reader is a free, open-source PDF viewer for Windows. It provides basic PDF viewing, printing and annotation features in a lightweight program.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API