
Description: PDF Annotator is a PDF viewer and editor that allows users to add annotations like text comments, highlights, shapes, and drawings to PDF files. It has basic PDF editing features to rearrange or delete pages.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Foobnix PDF Reader is a free, open source PDF reader for Windows, Linux and Mac. It has a simple, clean interface with all the basic PDF viewing features like bookmarks, annotations and form filling.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API