Vireo is a cross-platform SIP based enriched softphone and VoIP client for desktop computers. Vireo supports multiple audio codecs including HD voice codecs. It supports G.711 A-law, G.711 Ã?Â¼-Law, Speex, iLBC, GSM, G.722, and SILK codecs. Vireo provides you with a very easily accessible call log. All your calls through Vireo will be grouped in one place with information about the contact, date, time, direction and duration of your calls. Features also include dial pad that makes you able to call any sip number and performs well against well known SIP servers like OpenSIPS and Asterisk.