HEATKEYS

A web-based XML validator. Can be used for free. Validates XML files, prompts the user for referenced files (e. g., XSD), shows good error messages.

HTML XHTML CSS JavaScript XML XSL ASP SQL ADO VBScript Tutorials References Examples

W3C

XML Check is free online XML and Sitemap validation service and software. It does strict scheme validation, finds all document structure issues and reports errors with line and column numbers

JetBrains, creator of the best Java IDE - IntelliJ IDEA - is a technology-leading software development firm specializing in the creation of intelligent development tools.

For Focused .NET/XML and Web Services Training Visit the XML for ASP.NET Developers Website: http://www.xmlforasp.net

Online tools for developers, including formatters (JSON, XML, HTML, SQL, etc.), minifiers (JavaScript, CSS), validators, compactors and many more!

State of Michigan - State of Michigan

SitePoint.com - With a vast variety of web design tutorials and articles coupled with a vibrant and well informed community, SitePoint the natural place to go to grow your online business

Web Design and HTML are all about creating a great Web site. Use Web development and Web site design to build Web sites that customers return to over and over again. On this site learn the basics of Web design, HTML, XML, and Web development.

oXygen XML Editor is a cross platform XML Editor providing tools for XML authoring, XML conversion, XSL, XSLT, XQuery, XML Schema, DTD, Relax NG and Schematron development, SOAP and WSDL.