Open Access
- Merck Manual - Professional
- Academic Journals
- Africa Digital Library
- Agriknowledge
- BASE - Bielefid Academic Search Engine
- Bookboon
- College Open Textbooks
- Commonwealth of Learning
- Digital Book Index
- Economics eJournal
- Essays
- Flatworld Knowledge
- Free Books for Doctors
- Free Medical Journals
- Gates Open Research
- Global Text Project
- Google Books
- Hindawi Publishing
- Intech
- International Monetary Fund (IMF)
- Internet Archive
- Internet Public Library
- Land Portal
- MDPI Open Access Journals
- MITs Open Course Ware
- OER Commons
- Online Newspapers
- Open Courseware Consortium
- Open Humanities Press
- Open Knowledge Repository
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