XSL Transformer Utility
Sometimes I've got a big block of XML and I need to quickly extract data from it for some one-time use so I wrote this little XSL transformer app. I paste my XML in one box, type up some XSL in the other one and "Transform". A new box pops up with the transformed XML. So fast and easy!
The "Insert XSL" menu item has a handful of common XSL commands the syntax of which I can never quite remember and the Help menu has a "Tutorial" button that just opens up the w3schools XSL Tutorial in a browser.
This util isn't for messing around. It's for quickly writing an XSL transform and getting on with your work.