With Yahoo! Messenger you can make free worldwide PC-to-PC calls. Plus call regular or mobile phones in the U.S. and worldwide.

You can also have all your IM friends in one place. Ping-away with people who use Windows Live Messenger. They'll also be on your contact list so you can see when they're online. You can add your personal touch, using handy plug-ins to deliver the stuff you want to your Messenger. You can also use LAUNCHcast radio and choose from dozens of free web radio stations or create your own.