Ekiga (formely known as GnomeMeeting) is a soft phone, video conferencing, and instant messenger application for use over the Internet. It supports HD sound quality and video up to DVD size and quality. It is interoperable with many other standards compliant software, hardware, and service providers as it uses both of the major telephony standards, SIP and H.323.
Seagull is a multi-protocol traffic generator test tool. Primarily aimed at IMS protocols, it is a powerful traffic generator for functional, load, endurance, stress, and performance tests for almost any kind of protocol. It currently supports Diameter, SIP, HTTP, XCAP, H.248 (ASCII) over UDP/TCP/SCTP/TLS, and TCAP over SS7 or SIGTRAN.
Thunderbolt is a middleware infrastructure suite that includes connectors, Java development libraries, a business process design GUI, and a system monitor GUI. It is appropriate for both telco and financial services. It provides the basis for a simple, efficient integration infrastructure which can be easily extended. While maintaining a SOA in mind, it can easily orchestrate Web services and legacy systems. It's also useful for developing proof of concept projects requiring processing in real time, batch, or both.