Touch Racer is described as '"Touch Racer" is software that turns any Android device into a racing wheel controller' and is an app in the Gaming Software category. There are five alternatives to Touch Racer for a variety of platforms, including Windows, Mac, Android, iPhone and Android Tablet. The best alternative is Joypad, which is free. Other great apps like Touch Racer are Wifipad (Free), aGamepad (Free, Open Source), Mobile Gamepad (Free) and Ultimate Gamepad (Free).
WifiPad transforms your iPhone/iPod Touch into a wireless gamepad. It simulates keyboard events on a computer running the WifiPad Server over the Wifi network. It works with any games that accepts keyboard keys as input.