PrEd is a Java-based graphical utility to find and edit Java property files in JAR, WAR, and other kinds of ZIP archives. It is an appropriate tool for customizing Java applications which use XML and Property files for their configuration. It provides an interface to edit the property values of property files and to edit the values of XML text nodes and attributes. No knowledge of XML is needed to edit XML files. The program can update JAR and WAR files without having to extract them.
Mozilla Localization with PO Files provides Mozilla DTD and properties files converted to the Gettext PO format to allow easier localization using one of the graphical PO editors such as KBabel, GTranslator, or poEdit. These files are created using the moz2po application from the Translate package.