
Description: Lightweight PDF is a free, open source PDF viewer for Windows. It is a fast, small, and feature-rich PDF reader. It allows viewing, printing, and searching PDF documents.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Smallpdf is a free online PDF editor that allows you to easily edit, compress, convert, merge, split, and unlock PDF files. It offers core editing features like adding or removing pages, rotating pages, reorganizing pages, extracting images, adding watermarks, etc.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API