
Description: NightPDF is a free, open-source PDF editor and viewer for Windows. It provides basic PDF editing features like merging PDFs, adding or removing pages, rotating pages, reordering pages, splitting PDFs, encrypting/decrypting PDFs, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: OpenViewerFX is a free, open-source image viewer, converter and editor for Windows. It supports a wide range of image formats and has basic editing features like cropping, resizing and color adjustments.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API