Databases List: O

OMIM is a comprehensive, authoritative compendium of human genes and genetic phenotypes that is freely available and updated daily. OMIM is authored and edited at the McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, under the direction of Dr. Ada Hamosh.

Open Journal Finder is a search-based tool that helps researchers identify where they can publish Open Access under their institution's Read & Publish deal.

Open-i service of the National Library of Medicine enables search and retrieval of abstracts and images (including charts, graphs, clinical images, etc.) from the open source literature, and biomedical image collections. 

The portal for rare diseases and orphan drugs.

Comprehensive index to the international literature of biomedicine including clinical practice, psychosocial issues, health care administration, medical research, nursing, and more.

Provides access to a variety of databases of articles, eBooks, abstracts, and other resources under OVID.

Oxford Reference Online contains about 100 general and subject dictionaries, and language reference works published by Oxford University Press.