Zipcodes - FR lets you easily and quickly find any french city and zipcode.
If you know the name of the city but not its zipcode or vice versa just a few letters or numbers will be enough to quickly find it.
Search works as a filter which will show you only the cities containing the letters and numbers you've entered.
You can even use several words or numbers separated by spaces.
Once you've found the city you were looking for you can just copy the information you are looking for and use it on any other iPhone application such as mail, text, or online forms.
The complete city list is conveniently sorted by state and zipcode.
All this data is stored in your iPhone or iPod Touch and is available instantaneously, no data link is necessary.
Very useful for genealogy!
Thanks for all those starred comments!