Open Access Resources:

Open-access (OA) literature is digital, online, free of charge, and free of most copyright and licensing restrictions. What make it possible is the internet and the consent of the author or copyright-holder”. - Peter Suber. Open Access resources are those that can be accessed by anyone at any time without restraint.

OA Publishing Directories

1. Directory of Open Access Books (DOAB) http://doabooks.org
2. Directory of Open Access Journals (DOAJ) http://www.doaj.org
3. Free Medical Journals http://www.freemedicaljournals.com
4. Institutional Archives Registry http://roar.eprints.org
5. Open Access Directory http://oad.simmons.edu/oadwiki/Main_Page
6. DOAR http://www.opendoar.org
7. ROAR http://roarmap.eprints.org 

Open Access Search Engines

1. BASE: Bielefeld Academic Search Engine http://www.base-search.net
2. CiteSeerX http://citeseerx.ist.psu.edu
3. Core: Connecting Repositories http://core.kmi.open.ac.uk/search
4. Google Scholar http://scholar.google.co.in
5. Microsoft Academic Search http://academic.research.microsoft.com
6. OAIster (WorldCat) http://oaister.worldcat.org
7. OAJSE http://www.oajse.com
8. JURN http://www.jurn.org

Indian Open Access Journals

1. Academy & Industry Research Collaboration Center (AIRCC) http://airccse.org
2. CSIR-NISCAIR Online Periodical Repository: http://nopr.niscair.res.in/
3. Indian Academy of Science http://www.ias.ac.in/Journals/Overview
4. Indian Medlars Centre MedInd Journals http://www.indmed.nic.in/medindlist.html
5. Indian Society for Education and Environment https://www.iseeadyar.org/services-journals
6. Medknow Journals http://www.medknow.com

Open Access Journal Publisher

1. BMC http://www.biomedcentral.com
2. Computational psychiatry http://computationalpsychiatry.org
3. Intech http://www.intechopen.com
4. Network Neuroscience http://www.mitpressjournals.org/netn
5. Open Mind http://open-mind.net
6. PLoS http://www.plos.org
7. PeerJ https://peerj.com

Open Access E-books

1. Authorama http://www.authorama.com
2. Bartleby http://www.bartleby.com
3. DOAB: Directory of Open Access Books http://doabooks.org
4. eBooks@Adelaide https://ebooks.adelaide.edu.au
5. OAPEN http://www.oapen.org/home
6. Open Library https://openlibrary.org
7. InTech open Books http://www.intechopen.com/books
8. Project Gutenberg http://www.gutenberg.org
9. Read Print http://www.readprint.com
10. Rare Book http://www.rarebookroom.org
11. The American School of Classical Studies at Athens (ASCSA) http://www.ascsa.edu.gr/index.php/publications/open-access-ebooks
12. The Universal Digital Library Million Book Collection http://www.ulib.org/index.htm

Open Access Standard Sources

1. ECMA International open standards http://www.ecma-international.org/publications/standards/Standard.htm
2. OASIS Open standards https://www.oasis-open.org/standards
3. Open Geospatial Consortium http://www.opengeospatial.org/standards/is
4. World Wide Web Consortium Open Standard http://open-stand.org

Open Access Patent Sources

1. AusPat http://pericles.ipaustralia.gov.au/ols/auspat/quickSearch.do
2. Esp@cenet http://ep.espacenet.com
3. Indian Patent Office http://ipindiaservices.gov.in/publicsearch
4. US Patent and Trademark Office (PTO) http://patft.uspto.gov

Open Access ETD Sources

1. Australian University Theses & Dissertations http://trove.nla.gov.au/result?q=+&l-format=Thesis
2. DiVA portal http://www.diva-portal.org/smash/search.jsf
3. DART-Europe E-Theses Portal http://www.dart-europe.eu/basic-search.php
4. Mahatma Gandhi University Online Theses Library http://www.mgutheses.in
5. NDTLD http://www.ndltd.org
6. Open Access Theses and Dissertations: OATD http://oatd.org
7. Open Directory Project Free Dissertations http://www.dmoz.org/search?q=free+dissertation
8. org http://www.openthesis.org
9. PQDT OPEN: ProQuest Digital Theses http://pqdtopen.proquest.com
10. ShodhGanga, India http://shodhganga.inflibnet.ac.in
11. Theses Canada (Library and Archives Canada) http://www.collectionscanada.gc.ca/thesescanada/index-e.html

E-print Archive

1. org http://arxiv.org
2. CERN Document Server http://cds.cern.ch
3. Chemical Sciences Repository http://www.rsc.li/repository
4. Cogprints http://cogprints.org
5. Cryptology ePrint Archive https://eprint.iacr.org
6. Eprint Network http://www.osti.gov/eprints
7. HAL-SHS Archive of scientific literature https://halshs.archives-ouvertes.fr/search/index
8. HAL open archive Scholarly documents https://hal.archives-ouvertes.fr/search/index
9. Institut Nicod Eprints Archive http://jeannicod.ccsd.cnrs.fr/search
10. Lanl Arxiv E-Print Archive https://www.trentu.ca/library/help/databases/lanlarchives
11. MédiHal open archive of scientific images https://medihal.archives-ouvertes.fr
12. Organic eprints http://orgprints.org
13. PhilSci-Archive http://repec.org
14. RePEc (Research Papers in Economics) http://repec.org
15. Solar Physics E-Print Archive http://solar.physics.montana.edu/cgi-bin/eprint/default_page.pl

Open Education Courseware

1. Carnegie Mellon http://oli.cmu.edu/learn-with-oli/see-our-free-open-courses
2. Harvard OpenCourseWare http://www.extension.harvard.edu/courses
3. Johns Hopkins Opencourseware http://ocw.jhsph.edu
4. MIT Open Courseware (OCW) http://ocw.mit.edu
5. Notre Dame http://ocw.nd.edu
6. NPTEL http://nptel.ac.in
7. OpenMichigan http://open.umich.edu/education
8. Open Yale Courses http://oyc.yale.edu/courses
9. Oxford Mathematics OpenCourseWare https://www.maths.ox.ac.uk/opencourseware
10. Tufts University http://ocw.tufts.edu

Open Online Learning Tools

1. Codecademy http://www.codecademy.com
2. Coursera https://www.coursera.org
3. Duolingo https://www.duolingo.com
4. Edx https://www.edx.org
5. EduTopia https://www.edutopia.org/blog/googles-open-course-builder-todd-finley
6. Khan Academy https://www.khanacademy.org
7. Massive Open Online Courses https://www.mooc-list.com
8. Open Online education https://edu.google.com/openonline/index.html
9. Purdue OWL https://owl.english.purdue.edu/owl
10. Queensland University of Technology https://www.qut.edu.au/study/open-online-learning
11. Udemy https://www.udemy.com

Virtual Libraries/Subject Gateways

1. Hathi Trust Digital Library https://www.hathitrust.org
2. Infoport http://infoport.inflibnet.ac.in
3. Internet Public Library http://www.ipl.org
4. Intute http://www.intute.ac.uk
5. Social Science Cyber Library http://www.socsccybraryamu.ac.in/index.php/users-component/subject-gateways
6. Vifamath: the Virtual Library of Mathematics http://vifamath.de
7. WWW Virtual Library http://vlib.org
8. org https://worldwidescience.org

Open Access Video Lectures

1. Academic Earth http://academicearth.org
2. Bioinformatics Centre of BTIS net https://sites.google.com/a/sgbau.ac.in/bioinformatics-centre-of-btisnet/open-access-videolectures
3. Engineering Tube http://engineeringtube.net
4. Free Lecture videos http://www.freelecturevideos.com
5. Free Science Videos and Lectures http://www.freesciencelectures.com
6. Open Yale courses http://oyc.yale.edu

Video Lecture http://videolectures.net