XRay is a free XML editing enviroment. Now in its second major release, XRay provides support for XML Schema (XSD) and an integrated online XML tutorial system.
This is a nice collection of useful XSLT transforms, models and reusable fragments under GPL, involving HTML tables, XML Schema, HTML GUI, MathML, SQL analogy, etc. This has been developped as part of the "Worlwide Botanical Knowledge Base" project, ( htt