The Inter-University Consortium for Political and Social Research (ICPSR) provides 8000+ data sets. Topics include aging, criminal justice, education, or health.

As an example, here is my favorite, the summary of the "500 Family Study". This study includes questionnaire, cortisol, and experience sampling data:

The 500 Family Study was designed to obtain in-depth information on middle class, dual-career families living in the United States. To understand the complex dynamics of today's families and the strategies they use to balance the demands of work and family, over 500 families from 8 cities across the United States were studied. To address different issues facing parents with older and younger children, families with adolescents and families with kindergartners were included in the sample. Working mothers and fathers are now splitting their time between their responsibilities to their family, and to their respective occupations. This study of 500 families explores how work affects the lives and well-being of parents and their children.