OpenTrials brings together data from clinical trials registries, PubMed, the FDA, and other sources in one place. Currently in beta. Why is OpenTrials important? See the video below on related AllTrials initiative.
Premier database containing over 24 million references to journal articles in life sciences with a focus on biomedicine. Freely available and includes MEDLINE. This link goes to the version with UBC elink.
Premier biomedical database with over 23 million journal articles in the life sciences. Similar to Pubmed in content, this OvidSP interface facilitates structured searching and allows editing of search histories.