Cars.com: Leafing through a grimy copy of AutoTrader while you're waiting for an oil change is one of America's great pastimes. Cars.com lets you replicate the endless process of lusting after cars you can't afford, and feeling smug satisfaction of ignoring over used cars that you can afford, with a free iPhone app. Some App Store commenters are complaining that there aren't enough search options, but for the most part they're there—they're just hidden behind the "Sort" button in the search results.
Meebo: Hardcore power messagers (who are you people, exactly?) might want to stick with their Beejives and Trillians, but for the rest of us, Meebo will do just fine. It's nearly as good as the best iPhone messaging apps out there, and it costs absolutely nothing. Love.