Lightweight XML Editor

FoxeFoxe is a lightweight XML editor written in C++ which is excellent for quickly examining and reviewing XML files. It's a standalone app so know install either and it roughly uses 1.5 to 3 times the memory size of a document.

Its lacking schema validation, but handles Unicode file with and without BOM plus a range of other encoding styles.

http://www.firstobject.com/dn_editor.htm