
Description: The W3C Markup Validation Service is a free tool that checks HTML and XHTML documents for conformance to W3C standards. It can help identify potential issues in web pages and ensure they use valid markup.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Total Validator is a data validation and data cleansing software tool. It can check, standardize, and correct data in various formats like CSV files, databases, and spreadsheets. Its key features include customizable validation rules, duplicate detection, parsing unstructured data, and interactive reports.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API