XAF
Xml Automation Framework (XAF) is an XML based automation framework
...Apart from this, TCP/IP packets can be crafted seamlessly in XML's. As a result, any type of network flows can be simulated. The packets can be sent over a real/virtual network interface OR dumped into pcap file for further analysis.
Originally designed for networking(datacom)/telecom testing applications, this tool can be expanded to other applications as well.