I present a VoIP-program under Mac - Telephone. This is a native program written in Objective-C / Cocoa. I do not like the fact that most softphones have a terrible interface, besides trying to visually look like iron phones. It seems to me that ordinary users do not have to draw a mobile phone on the computer screen, so that they understand where to click. That's what happened.
When you enter a name or phone number, a search is performed in the system-wide address book (which, by the way, can be synchronized by regular means between several computers and an iPhone). Visible search result.
Phone call. ')
Settings.
Supported codecs:
G.711 family (PCMA, PCMU);
Speex / 8000 (narrowband);
Speex / 16000 (wideband);
Speex / 32000 (ultra-wideband);
iLBC;
GSM;
L16.
Works sending DTMF, in the presence of Russian and English interfaces. System Requirements: Mac OS X 10.5 Leopard on Intel platform.