
Description: PDF4Free is a free, open-source PDF editor that allows users to view, create, edit, convert, encrypt, sign and print PDF documents. It offers basic PDF editing features like adding text, images, shapes, whiteout, highlights, annotations and digital signatures.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: DeftPDF is a PDF editor and converter software that allows you to edit, annotate, redact, secure, optimize, and convert PDF files. It provides features like commenting, form editing, digital signing, redaction, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API