The XMLmind XML Editor (XXE for short) is a great general-purpose XML editor, but has surprisingly powerful support for working with DocBook materials in an author-friendly way.
Inspired by Yahoo's Pipes, DERI Web Data Pipes implement a generalization which can also deal with formats such as RDF (RDFa), Microformats and generic XML.
Vex - A Visual Editor for XML Vex is an editor for XML documents. The "visual" part comes from the fact that Vex hides the raw XML tags from the user, providing instead a wordprocessor-like interface. Because of this, Vex is best suited for "document-sty