Blink is a state of the art, easy to use SIP client. Blink offers Rich Multimedia Communications based on SIP protocol using Future Proof Addressing in the form of an e-mail address. Easy integration with existing SIP Service Providers. Open Source, you get the source code and you can contribute.
FeaturesBlink is an IETF based SIP client that implements audio and video sessions using RTP protocol, session based Instant Messaging, file transfer and multi-party chat sessions using MSRP protocol, screen sharing using VNC protocol, publication/subscription for presence information and buddy list management using RLS and XCAP protocols.
To download the software go to http://iCanBlink.com