Xopus is our wysiwyg browser based XML editor.
Xopus is easy to use and to implement.
For input it requires data (XML), style (XSLT) and rules (Schema).
Xopus performs some magic on this and turns it into an editor.
So inline WYSIWYG editing, coolness. There is a demo, but it requires IE5.5 or up for now. And it is soposed to be going OpenSource.
[via be blogging]