Good free XML utilities for windows

Experts, please let me know if you can recommend any free XML validation tool (not the generic plugins available in Notepad++, browser, etc) which is more advanced in terms of debugging the errors. Please recommend only if you have personally used it.
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Gertone (Geert Bormans)Information ArchitectCommented:

I have done XML 24/7 over the past 20 years and have used all the cool tools on the block extensively.
I can only say, Oxygen is not a free tool, but if you are serious about working with XML, it is worth the dollars 10 times.
The thing about free tools is that they are usually developed by a small team, picking the low hanging fruit, not bothering getting the subtle errors out. As you may have found out already, Notepad++ XPath support is a joke, as an example

All you need is Oxygen Developer Professional, not that expensive you will see
For that you get a tool that is 100% standards compliant and following up on standard development on all levels

Just my 2 cts
ste5anSenior DeveloperCommented:
I was happy with Altova XML Spy (not free either). Especially it's feature to act as SOAP proxy was really cool.

As you tagged your post Java: Look for plugins for your IDE.
Try XTrans, I use it all the time for XSLT development and XML validation.

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I use XMLPad and XML Notepad.
sukhoi35Author Commented:
Thank you
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