Preprints

• arXiv.org
  Open access to 400,000+ e-prints in Physics, Mathematics, Computer Science and Quantitative Biology.
• bioRxiv: the Preprint Server for Biology
• CERN Document Server
  Over 800,000 bibliographic records, including 360,000 fulltext documents, of interest to those working in particle physics and related areas. Covers preprints, articles, books, journals, and photographs.
• Nature Precedings
  Nature Precedings is a place for researchers to share pre-publication research, unpublished manuscripts, presentations, posters, white papers, technical papers, supplementary findings, and other scientific documents.
• medRxiv: the Preprint Server for Health Sciences
• Preprints.org
  Multidisciplinary preprints server with over 10,000 articles available.
• ResearchGate
  A networking site for researchers that allows posting, requesting and sharing of preprint and published articles.