oXygen XML Author is a cross platform Visual XML Editor, based on the oXygen XML Editor.

It supports visual XML editing driven by CSS stylesheets for DITA, DocBook 4 and 5, TEI P4 and P5 and XHTML.

The DITA Maps Manager side panel allows viewing, editing and publishing of DITA map files. It acts also similar with a project manager allowing you to easily open different topics/concepts for editing. The toolbar, the contextual menu and drag and drop actions allow you to change the map content.

The XML content included using DITA conref is presented in place as a read only block that can be collapsed/expanded. With the navigation links support it is possible to go from a DITA conref to the referred content by just a single click.

The general editing support includes document templates for easily creating new XML instances, possibility to define actions for creating and editing lists, tables and marking up specific content, XML Catalogs for faster access to resources, schema files for validation, transformation scenarios to convert from XML to HTML and/or PDF.

Other features include: spell checking, validation, search and replace, XPath execution, etc.

oXygen XML Author can be downloaded from:
http://www.oxygenxml.com/download_oxygenxml_author.html

For a 30 day trial license key, see:
http://www.oxygenxml.com/register.html