XPath XSLT Editor and XML Document Explorer for MSXML 6+ XML DOM Tree (Split View, Left DOM Tree, Right Tabbed XPath or XSTL Windows). Create XPath Statements and XSLT (stylesheet transforms).
- Test XPATH Against selected Nodes
- Write XSLT and Perform Transforms
- Load XML Documents and View XML Nodes
Actually I've used this program multiple times at my day job, it has always made it easy to search XML and transform it into other things, like JSON,, CSV, text, even PERL, it is interactive. I wrote it so my vote doesn't mean much, but I endorse it because any program I find useful at my day job has its merits.