
Description: VisualDiffer is a free, open source cross-platform visual diff tool for developers. It allows comparing images, directories, and version controlled projects to detect file changes over time. Key features include split screen viewing, pixel and file differencing, filtering file types, ignoring file differences, etc.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: P4Merge is a visual diff and merge tool from Perforce Software. It allows developers to visually compare file changes, merge code branches, and resolve merge conflicts. P4Merge integrates with version control systems like Perforce, Git, SVN, etc.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API