Useful XSLT / XML tools

I've worked on a XSLT based ad-hoc reporting solution a few months back. I don't think could have made much progress without the following tools at my side. Just thought I'd give them an honorable mention.

• SketchPath - If you do any work involving XPath, you just gotta have this tool.


• Xml Notepad 2007 - Microsoft's own Xml Editor (what's great is that the source is released under the Ms-PL)


• And Visual Studio 2008 for testing out the transformations and everything else that went into the process.

You guys got any favourite XML tools?