GenDiapo is renamed GenDoc. GenDoc is a XML Editor written in Java2. It is based on a existing project (MerlotXML now called Xerlin), and can use two kinds of plugins (DTD and/or action) for editing and publishing
Kati is simplified schema-aware xml editor written in java. It supports just one fragment of the capabilities of XML Schema, but it enables a naive user to build a valid xml file with some clicks. Simply it does not allow the users to make mistakes.
A lightweight cross platform XML editor. It has a tree viewer/editor and supports content completion, XPath, XQuery, XSLT, XML document validation etc. Many GUI features are configurable and supports multiple languages (localization).