
Description: PDF Letterhead is software that allows users to easily create customized letterhead templates as PDF files. It provides tools to add logos, contact info, and design elements to letterhead for professional correspondence.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PDF24 Tools is a free PDF software suite for Windows that includes functionalities like PDF creation, merging, splitting, encryption, conversion, and more. It's easy to use with an intuitive interface.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API