See also the Home Tab.

• arXiv Preprint Server (Cornell Univ.) - physics, mathematics, non-linear science and computer science
• BookFinder.com - one of the best & largest meta-search site for new & used books.
• CAS Source Index - current and discontinued scientific and technical serial titles worldwide including journals, online preprint servers, conference proceedings, patent document series, meeting publications, and monographs containing collections of papers. [Note: this online version is missing some information from the CD product available at the Lockwood Reference Area CD Workstation.]
• Beyond CASSI (pre-1907 journal abbreviations) - Historic sci/tech journal abbreviations that pre-date Chemical Abstracts CASSI coverage.
• Digital Library for Physics, Astrophysics, and Instrumentation Astrophysics Data System (ADS) from NASA/Harvard University.
• Directory of Open Access Journals (Lund Univ.) - Over 9,700 peer reviewed, freely available journals, the most comprehensive directory on the Web. Article level search also available.
• East Asian Gateway Service Document Delivery (Univ. at Pittsburgh) - Free, fast delivery of Chinese documents/articles to any individual researchers for research and teaching purposes where the needed item is not in any U.S. library.
• Google Books - Over 15,000,000 books and magazine issues, with material added daily.
• HathiTrust - Over 8.7 million scanned items, all described by precise metadata. Full-text of copyrighted items (~73%) are generally inaccessible.
• Index Translationum (UNESCO) - 1.3 million translated books
• Landolt-Bornstein Substance / Property Index - Keyword searchable as well as molecular formula, element system, CAS Registry Numbers, chemical name, and zeolite indicies. UB has most of the older print volumes on the Lockwood Science & Engineering Reference shelves (QC61.L33 & QC61.L332).
• The Online Books Page (John Mark Ockerbloom, Univ. of Penna.) - A meta-search & directory of over 800,000 freely available online books.
• Publish or Perish (Anne-Wil Harzing) - a downloadable, free program analyzing Google Scholar citations to an author's publications. Reports statistics such as ave. cites per paper and h-index & related metrics. Disclaimer: Google Scholar citation data is very noisy & includes non-peer reviewed citing documents.  Citation variations likely inflate number of papers & citations.
• RoMEO - Over 400 publisher copyright and self-archiving policies (SHERPA)