Question: which one of the following is an instant messaging application?
Answer: There is a long list of instant messaging applications; some widely used ones (with over one million users daily) include QQ, Windows Live Messenger, Skype, AIM, Jabber, eBuddy, Yahoo! Messenger, IBM Lotus Sametime, ICQ, Xfire, MXfit, Gadu-Gadu, Paltalk, IMVU, Mail.ru Agent, Mettbo, PSYC and Bigant.