A single discovery search engine for print and digital library resources.

Access to major journals in the biomedical and related social sciences fields.

Search metadata records for journal articles, field-specific, for software.

Search engine for the content of repositories using BEpress software.

Reference management, with suggestions, related documents, etc.

arXiv is a repository of electronic preprints approved for posting after moderation, but not full peer review

The PubPeer database contains all articles.

Online collaborative writing, citing, hosting of data and publishing.

Find & request research article; offers alternative ways to get paywalled paper.

Scilit stores information about publications, journals, and publishers.