Wikipedia
stICQ is an ICQ client for mobile phones with symbian OS.
StICQ has been written by Russian programmer Sergey Taldykin. StICQ is a native Symbian application (.SIS) for instant messaging over Internet for the ICQ network (using the OSCAR protocol).
It supports all main statuses including "Not Available", "Invisible" etc., contact search using ICQ UID, black lists, multi-user support, sound announcements and even SMS sending using default ICQ server.
It is featured by small size, low memory usage and relatively stable work.
One of the key features of the client is its ability to suspend outcoming data until GPRS coverage is available. It also suspend the status of the user, while all other mobile clients ( Jimm, for instance) usually report connection problem and drop user out.
Currently, stICQ does not support smiley pictures but have a unique feature of quick emoticon input using the call button (special plugin required).
Notable, stICQ supports the yellow "Ready to chat" extended status while "Depressive", as well as "At home", "At work" etc. are displayed as "Offline". This caused to call stICQ an "anti-depressive ICQ".
The source code has been sold to the development team of Quiet Internet Pager messenger. 1.01 version QiP for Symbian has been released recently.
StICQ is free for download, as are wide variety of mods changing status icons and menu text.