SIP softphone - graphical client
Linphone is an audio and video internet phone using the SIP protocol. It has a GTK+ and console interface, includes a large variety of audio and video codecs, and provides IM features.
The main features of linphone are:
- a nice graphical interface;
- it includes a large variety of codecs with different quality / bandwidths;
- it uses the well-known and standardised SIP protocol.