The Baby Name Wizard's NameVoyager
This Java app actually works -- even in OS X. It takes a long time to load and get going, but then it's quite responsive. Brinna has never been in the top 1000. Ben is popular now. But check out "Emily". It has an explosive growth from about 1960 and is still on a rapid growth path. Alma and Alfred show a terrific crash between 1900 and 1950.
My guess is that this represents a true nonlinear ("chaos", butterfly wing, epidemic, etc) pattern. It would be interesting to do similar chart for various infectious diseases.