Seagull is a multi-protocol traffic generator. Especially targeted towards IMS, Seagull supports Diameter (RFC3588 and all applications) over TCP/SCTP and IPv4/IPv6 , TCAP (over SS7 or Sigtran), XCAP over HTTP and Radius.
hammer is a Http load testing tool for Unix/Linux platforms. hammer reads scripts of XML that describe the load tests. hammer is implemented in C++ using Xerces-C and Commoncpp2.