Denny Vrandecic has released Xml4Ada95, an open source DOM language binding for Ada based on Xerces, and therefore supports validation, schemas, and more. Xml4Ada95is licensed under a BSD-like license.
Alexandre Brilliant has released JXMLPad 1.9.7, a €90 shareware JavaBean component for editing XML. This is a bug fix release. Java 1.2 or later is required.