For random nerdery:
Behind the Name has probably the most accurate meanings/etymology of baby names on the internet.
Name Nerds has greats lists of "theme" names, and satisfies my love of Welsh & Scottish names. It also has incredibly helpful spelling-adjusted rankings for the US, and England & Wales as well.
Appellation Mountain has "profiles" on an ever-increasing variety of names, ranging from the everyday to the rare.
Nordic Names, as the name suggests, focuses on names used in Scandinavian (of any origin), and has many names & variants absent from other sources.
Forvo is a database of spoken word & names--great for actually hearing names from native speakers!
And of course, the SSA has yearly lists of the top 1000 since the 1879. That's a lot of names!
For help finding and testing baby names:
Behind the Name has a program to help you find the right name.
Nameberry has an extensive database of names, including modern variants.
The Baby Name Wizard takes the SSA data, and puts it into fun charts & maps.
For information about common "Native American" baby names misconceptions, check out Native Languages.http://www.native-languages.org/wrongnames.htm
You can create lists for others to rate at both Behind the Name (yes, again) and BabyNames.com.
I also hang out at the Baby Names forum on BabyCenter.
Other sources:
BibleHub
The Catholic Encyclopedia
Dictionary of Names from Medieval Sources
Euskal Onomastikaren Datutegia
Irish Names, Donnchadh Ó Corráin & Fidelma Maguire
Key to English Place-Names
Kirchenweb German Name Lexicon (in German)
Lexicon of Greek Personal Names
Medieval Names Archive
Prosopography of Anglo-Saxon England
SCA
Theoi Project
The Viking Answer Lady
