The ARIBIB is an on-line database for astronomical bibliography. It is freely available in the Internet. The bibliographical information is given in following formats: Image format, Index format or Reference format - all of them without abstracts.
SciTech Connect is a portal to free, publicly-available DOE-sponsored R&D results including technical reports, bibliographic citations, journal articles, conference papers, books, multimedia, software, and data information, and was developed by the U.S. Department of Energy
An interface to a crystal structure database that includes every structure published in the American Mineralogist, The Canadian Mineralogist, European Journal of Mineralogy and Physics and Chemistry of Minerals, as well as selected datasets from other journals.