One family of free data sites
1 reference sites covering name data drawn from national birth registers. Each answers one question properly instead of all of them badly. Nothing here is paid placement, and nothing asks you to sign up.
NameCurve (you are here)
Every name's real popularity curve, from the governments that register births — 146 years of US data and 126 of New Zealand's, side by side.
The other family
A different audience and a different subject, so it gets one link rather than a shared nav.
FuelFacts
Calories, protein, fat and 12 more nutrients for 1,799 foods, straight from the USDA SR Legacy tables.
All of these are built and maintained by one person, funded by advertising, and published with their working shown. Corrections go to the contact page; the data sources are listed on each site's method page.