$0.99 from JMHammond
Using Seek Cache is ridiculously simple:
Step 1: Tap the Seek Cache icon (and allow it to access your location).
Step 2: You’re done! Look at your nearby caches and go adventure!
Seek Cache sends your GPS coordinates (for the 3G iPhone) or your approximate location (for the original iPhone) to the Groundspeak geocaching.com search. The results are displayed immediately in Safari.
Why waste time punching in coordinates with the small keypad when you can let Seek Cache do it for you!