
Description: UnityPDF is an open-source PDF viewer and toolkit for manipulating PDF documents. It allows for PDF creation, editing, rendering, and conversion using a plugin-based architecture.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PDFtk is an open-source command-line tool for working with PDF documents. It enables users to merge, split, rotate, encrypt and decrypt PDF files. PDFtk is lightweight, fast and cross-platform.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API