
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: PDF Expert is a PDF reader and annotation tool for Mac. It allows you to view, edit, annotate, sign, and fill PDF documents. Key features include tabbed browsing, annotation tools, OCR text search, encryption support, digital signatures, and form filling.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API