"bioRxiv (pronounced "bio-archive") is a free online archive and distribution service for unpublished preprints in the life sciences. It is operated by Cold Spring Harbor Laboratory..." Started in November of 2013, the archive has a limited number of articles at this time.
"Searches over 50 databases and over 2100 selected websites from 12 federal agencies, offering 200 million pages of authoritative U.S. government science information including research and development results."
"Serves as the largest central resource for government-funded scientific, technical, engineering, and business related information. For more than 60 years, NTIS has assured access to approximately 3 million publications covering over 350 subject areas."