
Description: Fox toolkit is an open-source set of UI components for developing desktop applications. It provides widgets like buttons, menus, toolbars, grids, and more out of the box to build Windows, Linux, and macOS apps in C++ quickly.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: IUP is a portable GUI library written in C that provides controls like buttons, lists, and text fields. It aims to enable writing GUI apps that work across Windows, macOS, Linux and other platforms.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API