oXygen XML Author is a multi platform Visual XML Editor. Supports visual XML editing driven by CSS stylesheets with specializations for DITA, DocBook 4 and 5, TEI P4 and P5, XHTML. This support includes document templates for easily creating new XML instances, CSS for WYSIWYG like editing, interface actions for creating and editing lists, tables and marking up specific content, validation, transformation to HTML or PDF.
The release of version 21 of Oxygen XML Author adds numerous new features, updates, and improvements to the already robust, industry-leading XML authoring application. The primary focus for this major release was to evaluate user requests for improvements and additions, implement as many of them as possible, while preserving the reliability, stability, and performance requirements that the XML community has come to expect from the Oxygen suite of products.
Full changelog available here.