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Gadu Gadu is financed by the display of advertisements. As with ICQ, users are identified by their serial numbers. There are numerous add-ons available to provide extra features. The official version provides over 150 smiley icons, and allows off-line messages, data dispatch, and VoIP. From version 6.0, an experimental SSL secure connection mode can be used.
One of the most popular features of Gadu-Gadu is the status option , allowing users to display short text messages visible under their buddy icons on other user's contact list s.
Gadu-Gadu uses its own proprietary protocol. Many unofficial plug-ins have been created to expand its capabilities. Several other instant messagers have the ability to communicate with GG protocol - for example, Gaim and Tlen.
The manufacturer is based in Warsaw.