Mark Spencer ( born April 8 , 1977 ) is an American computer engineer .
Is the original author of the GTK+ - based instant messaging client Gaim ( which has since been renamed to Pidgin ) , the L2TP daemon l2tpd and the Cheops Network User Interface .
Mark Spencer ( born April 8 , 1977 ) is an American computer engineer and is the original author of the GTK+ - based instant messaging client Gaim ( which has since been renamed to Pidgin ) , the L2TP daemon l2tpd and the Cheops Network User Interface .