The United States Social Security Administration official website has a useful tool that shows the top five baby names by state. 

Try the tool for yourself here: http://www.ssa.gov

On the official website of the New South Wales Government there's a tool that allows you to explore the popular baby names in NSW over the past 100 years.

By typing any name into the 'Type a name' field you see its ranking from 1900 to 2011. By type any letter into the 'Type a name' field, for example, type 'A' (as below) to see names starting with 'A', type 'Al' to see names starting with 'Al'. You can then hover over the visualization and click a name for more information. Blue is for boys and pink is for girls.

Try the popular baby names explorer tool here: http://www.nsw.gov.au/about-nsw/popular-baby-names

If you are interested in baby names in England and Wales in the UK, the Office for National Statistics (ONS) has a neat interactive tool on their official website.

Search by boys or girls top 100 baby names and see how each name's rank has changed on the previous year, or see how each name's rank has changed in 10 years.

It shows that Amelia was the top ranked name in 2012 and 2011. However, if you look at the 10 year change Amelia was ranked at 25 in 2002.

Try ONS' interactive tool here: http://www.ons.gov.uk/ons/interactive/top-100-baby-names-in-england-and-wales---dvc11/index.html

The USA Social Security Administration official website has a really powerful tool that will show you the popularity of any name you enter. It shows the ranking of the name for 14 years.  Rank 1 is the most popular, rank 2 is the next most popular, and so forth. Baby name data are from Social Security card applications for births that occurred in the United States.

When I entered my name "Daniel", this was the result:

This is the result when I entered "Jacob":

Jacob has been the top boy baby name in the United States for the past 14 years, amazing!

Try the tool for yourself: http://www.ssa.gov/cgi-bin/babyname.cgi