Sarah C. Williams
Life Sciences Data Services Librarian
Data repositories are often either institution- or discipline-specific.
IDEALS (Illinois Digital Environment for Access to Learning and Scholarship) collects, disseminates and provides persistent and reliable access to the research and scholarship of faculty, staff, and students at the University of Illinois at Urbana-Champaign. The About IDEALS wiki provides helpful information about how to contribute materials and about policies and guidelines for IDEALS, but here are some quick links to relevant pages:
re3data.org is a research data repositories registry, which can be searched and browsed (by subject, content type, and country) to find relevant data repositories. Dryad and NCBI are examples of disciplinary repositories.
Dryad is a repository of data underlying the international scientific and medical literature. Dryad is governed by a nonprofit membership organization, and it's mission is to provide the infrastructure for, and promote the re-use of, data underlying the scholarly literature. The site includes Submitting Data FAQs that address all aspects of depositing data, such as data formats, ReadMe files, embargoes, and costs.
NCBI is a portal to numerous popular and well-established data repositories and tools for biotechnology research, such as GenBank (the NIH genetic sequence database). The site includes a How To: Submit data to NCBI page.