Link: http://www.visualschema.com/
Source Author or Organization: Siva Dirisala

Even though many of the XML Schemas are meant for functional users so that they can design new systems or map existing systems to be standards compliant, their complexity makes it difficult for these users to study them. Even many software developers have difficulty understanding the XML Schemas due to their complexity. Visual Schema presents the XML Schemas as familiar and easily navigable html forms, typically found in enterprise business applications, that help the users easily understand the structure of an XML document.