
Description: Stirling PDF is a PDF editing and conversion software that allows users to easily manipulate PDF files. It has tools to split, merge, compress, convert, encrypt/decrypt, edit text and images, add/remove pages, insert headers/footers, redact content, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Adobe Acrobat Reader is a free software application for viewing, printing, signing, and annotating PDF documents. It is the standard PDF viewer and one of the most popular free software downloads with over 2 billion installations.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API