The Ulysse Speedometer is an in-car informational dashboard (you can use it for your bike too of course). Very nicely laid out and customization interface, it can show your speed (current, average, max), miles travelled (by day, trip meter), GPS functions (navigation, compass, altitude), music and phone calling functions, and custom functions such as defining speed limit alerts, grabbing 0-60 times and more. Best of all, it’s free!
However, it looks like its only available for Android phones at the moment. Download it and give it a go!