Name Voyager -- Searchable index of names by popularity
This website was linked to on a message board that I frequent. You can type in the first few letters of a name and get the popularity (via shaded line graph) of names begining with those letters by decade and by sex. An invaluable resources if you're a writer, aspiring or otherwise. Should be a good way of avoiding 19th century women named Madison or Mackenzie. It goes back to 1900 and is Amerocentric.