Overcast is widely considered to be the best podcast app on iOS, if not all mobile platforms. For many, its no-nonsense interface and slick features (such as cutting dead air and boosting voices) make Apple's official app seem crude. You've had to pay $5 to see everything it has to offer, though... until now. App creator Marco Arment (he of Instapaper fame) has released Overcast 2, which switches to a completely free business model. As he puts it, he didn't like seeing the majority of users (80 percent) miss out on the features he wrote -- he'd rather make sure you see everything. You can still donate $1 per month if you want to help, but that contribution is strictly optional.