Access Science is a great first stop for information on science and technology. It includes the McGraw-Hill Encyclopedia of Science and Technology and the McGraw-Hill Dictionary of Scientific & Technical Terms, science news headlines, biographies of scientists and much more!
Recently in Indexes and databases Category
Essential Science Indicators ranks scientists, institutions, countries, and journals according to citations. It also includes the most highly cited papers and citation analysis (for analyzing research trends).
The Antarctic Bibliography covers all disciplines related to the region including biological and geological sciences, medical sciences, meteorology, oceanography, atmospheric and terrestrial physics, expeditions, logistics equipment and supplies, and tourism.
Photo courtesy of http://flickr.com/photos/hipperspective/31953297/.
If you're looking for research literature in any field of engineering, Engineering Village is a great place to go! It includes Compendex and INSPEC and has citations for journals, conference proceedings and papers, technical reports, books, and more from all over the world.
Try Materials Research Database with Metadex if you're looking for literature on materials such as metals, alloys, polymers, ceramics, and composites.