XSD Editor
XSD Editor provides a synchronized split-pane interface that simultaneously shows both a visual XSD Diagram and the underlying code, with changes in one pane immediately reflected in the other
EXSLT Tools
EXSLT support in Stylus Studio lets you extend XSLT 1.0 stylesheets and simplify many tasks including computing dates and times, performing mathematical computations, string manipulations and more.
Learn XQuery in 10 Minutes, by Dr. Michael Kay - An XQuery Tutorial
Learn XQuery in 10 Minutes By Dr. Michael Kay is for all those people who really want to know what XQuery is, but don't have the time to find out. It's the fastest XQuery tutorial on the planet - read it now!
XML Syntax Help - Intelligent XML Editing
Stylus Studio's XML Editors feature Intelligent XML Schema/DTD-Aware Code Sensing and context sensitive XML code auto-completion. Simplify XML editing with Stylus Studio today.