There are number of tools for generic XML data processing. These tools are used for creating and validating XML documents as well as transforming them from one format to another. The best-known commercial XML tools, generally known as "XML editors" are Altova XML Spy, Stylus Studio XML Editor and oXygenXML.
With an XML editor, one is able to perform an schema validation, which will verify whether the XML document conform to the XML schema.
Does Truugo compete with these tools? No. These tools are for creating and editing XML documents, but lacking features for detailed message validation. Truugo is a peer-to-peer platform for creating, maintaining and sharing detailed validators (=test profiles) and related documentation for enhanced content validation.
Web is full of "online XML validators". These validators perform only syntax check (well-formedness) and possibly DTD or schema validation. Truugo also provides a free XML editor including similar XML validator to emphasize the difference between schema validation and much more fine-grained content validation provided by Truugo.