Griffin Technology has released a free OS X application for finding clear FM stations within the U.S. for use with the iTrip FM transmitter.
The iTrip Station Finder’s city-based frequency list has been compiled by analyzing extensive data about a given metropolitan area and its current radio station offerings. Frequencies were then selected that were not only empty, but also contained adjacent clear channels. For example in Dallas, TX 102.5 is suggested for use with the iTrip. That means that not only 102.5 is clear, but 102.3 and 102.7 are clear as well.”
Griffin Announces the iTrip Station Finder application
Free software helps locate available iTrip frequencies in over 200 US cities