Civil Engineering Database From the American Society of Civil Engineers. No full text, but thousands of journals, papers, and books are indexed.
Data.gov: Manufacturing "Explore data, tools, apps and research related to new technologies, facilities, and research. The U.S. Government funds research for government agencies to help empower U.S. innovation—through this page you now have access to all of that valuable research and data."
Google Patents Search both U.S. and international patent offices.
Skills Commons "Your FREE and OPEN digital library of Workforce Training Materials Preparing the Workforce for 21st Century Employment through TAACCCT"
Springer Open "SpringerOpen, launched in June 2010, includes Springer’s portfolio of 200+ peer-reviewed fully open access journals across all areas of science."