XSLPalette -- The free, native XSLT 2.0 and XPath 2.0 debugging palette your text editor has been missing.
XSLPalette is a floating palette that brings XSLT debugging features to your favorite Mac OS X text editor. I like to combine Marc Liyanage's XSTL BBEdit Glossary for XSLT code auto-completion with XSLPalette for a full-featured XSLT editing environment.
XSLPalette is a floating, non-activating palette that will integrate well with your favorite text editor. It's almost like the XSLT palatte your editor has been missing. XSLPalette will add the following to your text editor:
Ability to select XML source documents and XSLT stylehseets created in your editor of choice (like BBEdit).
Execute your XSLT transformation from the XSLPalette UI.
View intuitive error messages, xsl:messages, and other diagnostic info in the XSLPalette console tab.
Ability to specify global xsl:params from the UI for dynamic XSLT.
View result of your transformation as raw text, a pretty DHTML tree view (when appropriate), or a rendered HTML page (when appropriate).
Save your document and param settings as .xslpalette documents for opening later.