XSL extensions and namespaces

Hi,

I was wondering if there was a list of some of the
better XSL extensions out there.

I know Microsoft has <msxsl:script> and a sql
extension.

What else is available?  Is there a site that lists
the more popular / useful ones anywhere?

Thanks,
Scott

PS, I posted a similar note a while ago but didn't
catch the answer and can't find it in search.  My
apologies to anyone who did right the first time.


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