Do you hate potholes?  Hit the Pothole was born out of frustration with the condition of the roads in Toronto. 
Using the crowd-sourced power of cyclists, we collect data about the location and severity of potholes on commonly used cycle routes. 
The scope has since grown to include world-wide reporting, and the ability for any vehicle to use the app to generate data.   (The logo is still a bike though)

This data is made freely available to everyone at www.hitthepothole.com.  Zoom in to your city to see a heat-map or individual point data showing potholes in your city.  If you'd like to export this data in CSV form, please see the technology page for instructions.
If you'd like to send this homepage map to your locally elected official with your city highlighted, simply copy the URL from the address bar and add ?address=<the address you want to show> and the map will default to this location when the link is clicked. 
For example, if you wanted to show someone Toronto, you would send the URL http://www.hitthepothole.com/index.html?address=Toronto,Canada

Surprisingly, Hit the Pothole runs with a completely free back-end infrastructure.  This website is all being hosted, for free, by Weebly.  The database - which holds the geo-spatial coordinates of the potholes - is being hosted by Google in Fusion Tables.
The iPhone application was built using the Appcelerator framework.