I use the Eclipse IDE frequently, and especially the Eclipse Modeling Framework (EMF), and the Eclipse XSD API for highly automated XML Schema generation. (And yes, I also like and use the Netbeans IDE often.)

Some EMF model editor examples from the NeXML schema engineering project

From my NeXML project for automated translation of the NeXus scattering science XML templates into XML Schema (using the Eclipse XSD API), with EMF Java bindings:

Overview of the NeXML schema loaded as an EMF genmodel.

A validating model instance editor for the NeXML schema.

A validating model instance editor for the NeXML schema.

A physically invalid scalar value detected by the validating EMF model instance editor for the NeXML schema.

An array of invalid length detected by the validating EMF model instance editor for the NeXML schema.

An array of valid length accepted by the validating EMF model instance editor for the NeXML schema.