Talkonaut is free mobile calling, VoIP enabled, Google Talk™ like application for your WinMo (and other mobile platforms – Symbian S60 and J2ME with MIDP-2.0). It supports Jabber, Google Talk, ICQ, MSN, AIM, and Yahoo networks both for chatting and voice calling.
Talkonaut is the first application based on revolutionary GTalk2VoIP gateway technology and allows you to make voice calls to any Google Talk and Windows Live Messenger users, to any SIP capable device, or to other mobile or landline phones cheaply.
Though similar applications like Fring are more popular, Talkonaut is a better application offering group chats, presence and status information, chat history, avatars, graphical smilies, vCard support, calling over GPRS, 3G or WiFi, traffic compression (Zlib), file sharing, SIP support, GPRS/WIFI auto-switching, and touch screen support.
The geekery follows, for the so inclined. Following is an illustration of how Talkonaut communicates with different protocols it supports.
Talkonaut is available for download free of charge for Windows Mobile 5.x/6.x devices. You can use Talkonaut for free to send IM messages only. Sending SMS messages and making voice calls initiated by Talkonaut are paid. Also, you might want to use it over an unlimited data plan. Making calls with Talkonaut over data connection consumes quite a lot of traffic. The average is 1.3Kbytes/sec each direction. However, text conversations do not consume much data.
You can download Talkonaut over-the-air by pointing your mobile browsers to http://get.talkonaut.com or snap the following tag for a direct download of the .cab file (1.19 MB).