The Virtual Training Suite provides free Internet tutorials on using the Web for education and research, written by qualified lecturers and librarians.
PhilPapers: Online Research in Philosophy: An index of current online research in Philosophy. Also contains bibliographies, discussion forums, and advanced research tools for researchers.
The Information Bridge: DOE Scientific and Technical Information provides free public access to over 279,000 full-text documents and bibliographic citations of Department of Energy (DOE) research report literature. Documents are primarily from 1991 forward and were produced by DOE, the DOE contractor community, and/or DOE grantees.
More than 3 Millions references! 300.000 accesses per month This is a collection of bibliographies of scientific literature in computer science from various sources, covering most aspects of computer science. The bibliographies are updated weekly from their original locations such that you'll always find the most recent versions here.