
Description: SimplePDF is an easy-to-use PDF editor that allows users to view, annotate, sign, and fill PDF documents. It has basic editing features like adding text, shapes, images, signatures, comments, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: PDFtool.org is a free online PDF editor that allows users to edit, merge, split, compress, and convert PDF files without installing any software. It provides basic PDF editing features like adding or removing pages, rotating pages, reordering pages, adding text, shapes, images, signatures to PDFs.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API