AccessEngineering is an award-winning engineering reference tool for professionals, academics, and students that provides seamless access to the world's best-known, most-used collection of authoritative, regularly updated engineering reference information.
Annual Reviews provides researchers, professors, and scientific professionals with a definitive academic resource in more than 45 scientific disciplines. This includes review articles in Biomedical/Life Sciences, Physical Sciences, Social Sciences and Economics.
Engineering Village takes engineering research to the next level with a comprehensive database that includes the most authoritative engineering resources available to answer today’s most timely questions—from theoretical to applied, and basic to complex.
HathiTrust is a partnership of academic & research institutions, offering a collection of millions of titles digitized from libraries around the world. Includes many sciences titles, especially foundational works in each discipline.
SciFinder Scholar: You must first create a free account (below) before you can use the database at this link. Use the “Research Topic” link; click the microscope icon to read Abstracts, and notice that some citations are links. Use Journal Finder and ILL to get actual articles.