Transform works with your favorite IDE/text editor to provide live XSLT transformations. Select a XML and XSLT source file, and Transform will show you the result in either a raw source or web view. Not only that, it will watch these files for changes and update the output automatically, creating an efficient workflow for developing XSLT scripts.
Features include: Updating preview when you save, EXSLT support (for functions implemented by libxslt), retina display support, error notification, full screen mode, output highlighting, live web view, plus more (see website for full list of features).
N.B. Transform processes XSLT using libxslt, which only supports XSLT version 1.0.