zk.xml Editor
From Documentation
The zk.xml Editor helps you edit your configuration file (the zk.xml file inside your project's WEB-INF folder) of the ZK Ajax Framework. The editor can be opened by right clicking the zk.xml file and selecting [Open With]/[XML Editor for zk.xml] from the context menu.
zk.xml editor provides content assistance functionality when editing the zk.xml configuration file, for detail descriptions of every element in zk.xml, please refer to ZK Developer's Reference: