
Description: Avalonia UI is an open source cross-platform UI framework for .NET apps. It allows developers to create desktop GUI apps that run on Windows, Linux and macOS using .NET technologies like XAML.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

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: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API