An interdisciplinary database which has much full-text. Always a good place to start. Covers 1971-present.

This multidisciplinary database can be searched by subject, author, and journal title. Articles that CITE a known author or work can also be searched. Cited reference searching helps identify more recent articles on the same topic.

A free federated vertical search portal for 15 professional scholarly societies  including Acoustical Society of America, American Geophysical Union, American Institute of Aeronautics and Astronautics, American Institute of Physics, American Physical Society, American Society of Civil Engineers, American Society of Mechanical Engineers,   The Institute of Electrical and Electronics Engineers, Institute of Physics Publishing, Optical Society of America, Society of Automotive Engineers, Society for Industrial and Applie Mathematics and SPIE.  Content sources include: three million articles and conference proceedings 50 million patents from the world's major patent offices full-text documents from the US Dept of Energy Information Bridge site.

Full-text access to 7100+ articles, 115,000 dictionary terms, over 2000 biographies of leading scientists, and hundreds of Research Updates in all areas of science and technology updated daily.

A good site to go to for pre-selected web sites on all aspects of Engineering, from Automotive to Structural Engineering.

Subtitled: "A Commonsense Guide to Engineering Reports & Theses" - provides good information on citing sources, basic grammar rules, writing styles and much more.