Free 3D Racing Game on iOS called Vector Runner
At first, I thought that Vector Runner was some kind of graphic design vector app but it turned out to be a great 3D racing game which is free to download from the App Store. It's been featured in the hot lists in the App Store when it was still a paid app so I downloaded it immediately when I saw that it was free. The graphics is great especially if your device has a Retina display. This has been recently updated so there are a few fixes to minor bugs that used to plague the old versions. This is a great game that I've been playing during my down times.