If you have been looking for a name for your baby, NameVoyager, a simple tool that displays US baby name trends by letter (or phrases) with data going back to late 19th century, could be very useful.
You can either look for letters (“J” for example) or phrases (“Jam” for example) or complete names (“James” for example) and see how they historically rise or wane in popularity. Note that since NameVoyager uses US Social Security data to plot the trends, this data does not reflect international trends.