At work, we use XML Spy. It is very impressive, but it also costs Eur 399 for a single license.
I am looking for an alternative; it must be gratis, for Windows (or cross platform), with full text view, tree view, and, most importantly, grid view, like this:
Beyond that, just standrd features, like find/replace, etc The more the merrier, but gratis/cheap & grid view are the important ones.
[Update] I want round trip editting. The grid should not just be for looking at. I want to be able to edit the grid and have it upate the underlying XML.