Firefly (Communications - Chat & Instant Messaging)

This SIP and IAX protocol VoIP Soft Phone allows people to talk to each other while connected to the Internet. Built-in voicemail. Calls to landline phones. Also works as chat client.Works with third-party SIP and IAX VoIP phone vendors. Works with Asterisk PBX server. Skinnable interface. Works behind NAT routers and firewalls.