Gnugadu2 is a modular instant messenger written with GTK+ targeted mainly at Polish users of propietary Gadu-Gadu network. GnuGadu2 sports a plugin extensible architecture. Beside Gadu-Gadu it also supports Jabber, Tlen.pl, sending smses to Polish mobile phones, spell checking, works with several sound servers. WWW: http://www.gnugadu.org