Google Voice is a popular service within the US, providing a single phone number to anyone which can then connect to land lines or cellphones, offers visual voice mail, forwarding, SMS, and more. Up until now, it's been easily integrated only on Android devices, while people wanting to access the service on the iPhone were left out in the cold, until a few third-party apps started appearing last month. In fact, Apple famously denied (or rather, "didn't approve") the Google Voice app back in 2009, and it's been sitting there in the App Store review queue for 16 months. However, things changed today when the official Google Voice app was finally made available in the App Store. From it, you can make free calls using the service, access your voicemail, send and receive SMS for free, and more. Of course since this service is only available in the US, so is the app. You need to setup a Google Voice account to use it, but both that and the app itself, are free.