
Description: PortableSigner is a free portable software used to digitally sign PDF and Office documents. It allows applying digital signatures without needing to install additional software.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: jPdf Tweak is an open-source Java application for editing PDF documents. It allows you to merge, split, rearrange, encrypt, decrypt, and add images or text to PDFs easily.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API