libqt4jon is a JSON serializer and deserializer that works with the Qt QVariant object. It can serialize primitives like integer, double, QString, lists, maps, and QObject * recursively. It serializes only properties declared with the QObject * Q_PROPERTY macro. It based on the json-c parser.
libqt4report is a library for Qt 4 that creates database report from an XML description. It is able to validate the XML file from an XSD schema, print the report directly, or generate SVG files. Calculations are performed by QScriptEngine. It can group data according to the result field value, calculate totals, and display images.