Tool / utility for checking debugging XPath queries [closed]

Has anyone got any recommendations for tools/utilities to use in creating/debugging XPath queries for Windows ?

What is XPath in HTML?

XPath stands for XML Path Language. It uses a non-XML syntax to provide a flexible way of addressing (pointing to) different parts of an XML document. It can also be used to test addressed nodes within a document to determine whether they match a pattern or not.

SketchPath looks like it might help (and is free)

If you have Notepad++, there's an XML tools plugin. Among the tools in that plugin is a simple XPath expression evaluator. Sketchpatch is much more complete (I've tried it and it's nice) but if you use Notepad++ all the time it's worth knowing about this plugin.