Selecting Statistics Cornell
VassarStats a useful and user-friendly tool for performing statistical computation
Data Services, George Mason University Libraries
Data Services provides help with finding, getting and using statistical, geospatial and qualitative data.
re3data.org is a searchable catalog / registry / directory / bibliography of research data repositories.
DTIC Defense Technical Information Center
"To provide essential, technical research, development, testing and evaluation (RDT&E) information rapidly, accurately and reliably to support our DoD customers' needs."