Trend data and estimates with "original analyses of national data sets" by the staff of this "non-profit, non-partisan research firm" affiliated with the National Institute of Child Health and Human Development.
The website data.unicef.org is a gateway to reliable and open data and analysis on the situation of children and women worldwide. International data on child care, health, nutrition and mortality. Also reports on maternal health and education.
From the Annie E. Casey Foundation: comparative data by state and across states, from government agencies. You can generate graphs, rankings and maps from housing, employment, health, and education data.