Everything costs too much. No matter where you go or what you do, somebody's got their hand out asking you for some more money. That's why people clip coupons, join membership stores, that sort of thing. That's also why services like Skype have taken off.
The notion of being able to make a phone call that doesn't cost anything is a popular one. Of course, to take advantage of this, you have to sign up, add contacts to your account, and a bunch of other housekeeping chores before you can start to make your calls. An alternative to this service is Viber.
Viber is a free service that lets you make VoIP calls from your iPhone to others who have the app installed on their phones. Rather than being completed as a "normal" call, Viber calls use your Wi-Fi or 3G connection to send your voice as data packets. Unlike Skype, Viber integrates with your iPhone's built-in contact management facility, so there's no re-entering contact info before you start making calls. In addition, all your Favorites, missed calls, and other good stuff are available through the app.
While Viber is only available for iPhone right now, the publisher promises that they're working on Android and Blackberry versions as well.