Xselerator is a fully functional XSLT editor and debugger, for professional XSLT programmers. The editor has automatic tag completion, color syntax highlighting, and element intellisense - which are all customizable to your preferences. For multiple languages, the IDE supports Unicode.
It has full debugging functionalities for XSL transformation. The debugger has Watch values (including full XPath expression watches), stepping, breakpoints, call-stacks, step backwards and more. Xselerator uses the MSXML parser for the debugger, but for your transformations you can set it up to use other transformation engines, such as Saxon, XT etc. Version 2.6 features: XML tidier - prettifies your XML/XSLT by inserting indentation (W3C HTML Tidy can also be used); UDP (User Defined Prefixes) allowing the configuration of namespace prefixes with language implementations.