A subject based repository of life sciences journal literature as well as materials deposited by individual authors. This is an extensive and expansive resource for researchers in the bioscience, biotech and biomedical related disciplines. The citations database PubMed links to full-text materials within PMC. Thanks to a NLM digitisation activity older journal content is being made freely available, back to the early 1900s in some cases. Currently 250 journal titles are included within the site. It is possible to register for an update email to ensure notification when new journals are added to the PMC collections. The size value given is the number of author submitted manuscripts.

This is a free archive and distribution service for unpublished preprints in the fields of organic chemistry and nanotechnology. It is managed and funded by the Beilstein-Institut, A non-profit institute dedicated to the advancement of the chemical sciences. Users may set up eAlerts or an RSS feed to be alerted about new content. The interface is in English.

ICOS Carbon Portal offers free access to high-quality and standardised greenhouse gas data, as well as to scientific and educational products and services. The Carbon Portal is a ‘one-stop shop’ for all ICOS data products. Carbon Portal manages data security, enforcement of the ICOS data policy, with user-friendly (and machine-friendly) internet- and other computer-network based interfaces. It organises long-term archiving of ICOS data products to guarantee their safe storage, future access and easy re-use. FAIR data handling is the key for the high ICOS data quality. ICOS has created a transparent, documented and reproducible process throughout the data life cycle: from the measurements at the station via the Thematic Centres and the ICOS Carbon Portal to the user. All data distributed from the stations and going through the Central Facilities, are distributed in Carbon Portal. We are following the international developments in FAIR data management to build interoperable systems and make ICOS data free available in a transparent way. The Carbon Portal is hosted by the Lund University in Sweden and Wageningen University in the Netherlands.

This is a subject based repository, that mirrors the data held on the PubMed Central site. Since 2010, the service diversified from PMC and introduced additional content including PubMed abstracts and biological patents. In addition this site acts as an Open Access repository for peer-reviewed research from researchers who have been funded by the Europe PMC Funders Group - submitted via the Europe PMC Manuscript Submission System A range of supporting guidance and background information are available on this site.

This site is a free preprint service for African scientists. The interface is in English.