
Description: W3 Markup is an open-source web design tool developed by the World Wide Web Consortium (W3C). It allows users to visually design and build web pages using a drag-and-drop interface with support for HTML, CSS, and accessibility features.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: XHTMLized is a free browser plugin that converts web pages into valid XHTML code. It cleans up messy HTML code, fixes errors, and adds missing tags to ensure web pages meet XHTML standards for improved accessibility and search engine optimization.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API