This is a small application I wrote when I was stuck in front of an XPath query that I just couldn't understand. Took about an hour and a half to whip it up. The idea is to let you execute a query and see for yourself the results that are returned.
There are other tools that does it, but either they are Java based and require > 15 Mb support libraries or they are web based (which I hate).
The application gets its input from one of two sources - a file or the clipboard, loads it into an
XmlDocument and start executing queries against it, showing you the result on the way.
I didn't built it to be performant or correct, just to do the job, so use it the next time you've XPath problems, and you'll like it. The other solution that I found was XmlSpy at 300$ +