
Description: Preview is a free and open-source document viewer application for macOS. It allows quick viewing of multiple file formats including images, PDFs, Markdown files, Office documents, and more. Preview has basic editing capabilities and annotation tools for PDFs.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: ViewPic is a free, open-source image viewer and organizer for Windows. It has a simple, clean interface for viewing photos and images quickly, with basic editing tools and the ability to create slideshows.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API