From Fabien Vavrand Analytics:
Xtream Query is an ExcelÂ® Add-in built to easily and quickly query and convert XML files to Excel, CSV or XML. Everything becomes simple: choose your files, select your nodes, and instantly see your results in ExcelÂ® while your query is running!
The XML structure you will navigate into can be loaded through an XSD, or directly from the XML files you want to query.
Build your query in a second! Once the structure is displayed from XML files, you can choose your nodes and attributes, select them with double click or Drag & Drop, and construct complex query filters.
Read your results directly in ExcelÂ®, export them in CSV, or extract sub parts of XML!