Skype

http://support.skype.com/index.php?_a=knowledgebase&_j=questiondetails&_i=409 http://share.highspeedconferencing.com/skype_new/premfeatures.jsp http://www.tradebit.com/channels/software/110543/multiple-skype-accounts-on-one-computer/ http://forum.skype.com/index.php?showtopic=77075 http://www.voiceemotion.com/ http://www.webcastacademy.net/node/270