- Reports
- SciTech Connect
- Free Articles
- Free Papers (دانلود کننده مقالات علمی)
- Elearnica
- Paper DL
- Zednee
منابع الکترونیکی رایگان (open Access)
Free Fulltext Sites
- Directory of Open Access Journals (Science & Engineering)
- Electronic Library of Mathematics
- Free Electronic EDUJS Journals
- Google Scholar
- J.STAGE Japan Science and Technology Information Aggregator, Electronic
- NewJournal of Physics
- OpCit Reference Linking and Citation Analysis for Open Archives
- Open Science Directory
- Prosim
- Strategian Science Articles
- Free Thesis
- Proquest
- Free E-Books
- Library Genesis
- En.bookfi.com
- Strategian E-book
- Eknigu
- Questia
- Giuciao
- Google Book Search
- Look for book
- NAP National Academis Press
- NLM Gateway A service of the U.S. National Institutes of Health
- The Online Books Page
- Strategian Science Books