NASA Technical Reports Server
"The NASA STI Repository (also known as the NASA Technical Reports Server (NTRS)) provides access to NASA metadata records, full-text online documents, images, and videos. The types of information included are conference papers, journal articles, meeting papers, patents, research reports, images, movies, and technical videos – scientific and technical information (STI) created or funded by NASA."
Defense Technical Information Center (DTIC) - Technical Reports
The Defense Technical Information Center serves the Department of Defense as a repository of government funded scientific, technical, engineering and business related information.