Out for a walk and spot a litter problem, an overflowing drain or another problem the local council should fix? iPhone app Snap Send Solve uses your GPS coordinates to determine which council is responsible, and then lets you send an email report direct to the relevant party.
You can optionally attach a photograph of the issue as well if you wish. The app doesn't guarantee anything will get done about the problem, but it's more efficient than trying to remember to make a phone call when you get home.
Not running with the iDevice crowd? Neat Streets, which we featured earlier this year, offers a similar concept for Android users (though its promise to release a BlackBerry version doesn't seem to have yet materialised).
Snap Send Solve is a free app for iPhone users.