From KDE Apps:
Version 4.1.0 of Syntext Serna, an XSL-based WYSIWYG XML content editor, has been released. Changes:
- Drag & drop from Microsoft® Office Word and web browsers.
- Drag & drop between opened documents.
- API for extending drag & drop from external applications and within Serna.
- Hot keys for Zoom commands, for switching between documents, and for operations with attributes.
- Fixed a number of stability issues.
Screenshots here, downloads (Windows, Mac, Linux RPM/Deb and Solaris) here. Note that this is proprietary software and licence costs start from $559 for one to three users (a limited time 25% reduction), although there is a free version. Uses Qt 4 (the website doesn't mention a dependency, so presumably it's static).