Talkonaut is a free Jabber (XMPP) client for your iPhone or iPod with free peer-to-peer voice calling over Jingle Audio extension compatible with GoogleTalk™. Talkonaut can be used with any standard Jabber account like Gmail, Gizmo5™, Jabber.ru or from your corporate Jabber server. If you do not have a Jabber account yet, you can register one right from the Talkonaut. Talkonaut supports a number of XMPP extensions including multi-user conference chat (XEP-0045), file and image sharing (XEP-0047, XEP-0065), vCard based avatars (XEP-0153) and many others.
You can also use Talkonaut to make cheap voice calls to landline or mobile phone numbers through GTalk2VoIP infrastructure. If you have a SIP account, you can use it with Talkonaut to make calls over SIP. SIP compatibility has been successfully tested with Gizmo5™, SIPNET™ and with a number of other providers. Users of Betamax's SIP accounts may experience some issues.
Calling functionality is available on iPhone, iPhone 3G, iPhone 3GS and 2nd generation iPod touch. All voice calling features on iPod touch require a compatible headset with a microphone.
Push notification is not currently supported.