Competitive exam Open Source Materials
https://www.competitionreview.in/free-resource
https://freeupscmaterials.org/
https://www.clearias.com/ias-study-materials/
GATE Exam Open Source Materials
https://gate.nptel.ac.in/departments.php?c_id=2
https://engineering.careers360.com/articles/gate-preparation-material
https://www.gate2016.info/free-gate-study-material/
https://qualifygate.com/study-material/
General link
https://swayam.gov.in/explorer
OPEN ACCESS E-BOOKS :-
Ekumbh https://ekumbh.aicte-india.org/
Free ebooks by Project Gutenberg https://www.gutenberg.org/
Internet Archive https://archive.org/index.php
The Directory of Open Access Books ( DOAB ) http://www.doabooks.org/
E-Books Directory http://www.e-booksdirectory.com/
Million Book Project https://archive.org/details/millionbooks
Open Textbook Library https://open.umn.edu/opentextbooks/
Rare Book Of India http://www.rarebooksocietyofindia.org/
OPEN ACCESS E-JOURNALS :-
Directory of Open Access Journals ( DOAJ ) https://doaj.org/
High Wire Press Archives http://home.highwire.org/about-us
INDIAN OPEN ACCESS E-JOURNALS
CSIR-NISCAIR Journals http://nopr.niscair.res.in/handle/123456789/2
Indian Academy of Science https://www.ias.ac.in/
Indian National Science Academy https://insa.nic.in/
OPEN COURSE WARE:-
National Institutes
NPTEL https://nptel.ac.in/
e-PG Pathshala https://epgp.inflibnet.ac.in/
eGyankosh http://egyankosh.ac.in/
International Institutes
MIT Courseware: – http://ocw.mit.edu/index.htm
OPEN ACCESS VIDEO SOURCES:-
Free Lecture Videos https://freevideolectures.com/
OPEN ACCESS THESES AND DISSERTATIONS:-
Open Access Theses and Dissertations https://oatd.org/
Shodhganga http://shodhganga.inflibnet.ac.in/
EBSCO Open Dissertations https://biblioboard.com/opendissertations/
Networked Digital Library of Theses and Dissertations http://www.ndltd.org/resources/find-etds
OPEN ACCESS Patent Database :-
Indian Patent Search (IPAIRS) http://ipindiaservices.gov.in/publicsearch/
OPEN ACCESS E-PRINT ARCHIVES :-
Open Access E-Print Archive http://www.loc.gov/rr/scitech/selected-internet/eprints.html
OPEN ACCESS BIBLIOGRAPHIC DATABASES:-
ChemSpider http://www.chemspider.com/
Collection of Computer Science Bibliographies https://liinwww.ira.uka.de/bibliography/
DBLP Computer Science Bibliography https://dblp.uni-trier.de/db/
ChemSynthesis http://www.chemsynthesis.com/
Indian Science Abstracts http://isa.niscair.res.in/
OPEN ACCESS ENCYLOPEDIA:-
Open Access Encyclopedia https://www.refseek.com/directory/encyclopedias.html
DiracDelta Science & Engineering Encyclopaedia http://www.diracdelta.co.uk/
OPEN ACCESS DIRECTORIES :-
Directory of Open Access Repositories (DOAR) http://www.opendoar.org/
OPEN ACCESS Dictionary:-
Webster’s Dictionary http://www.merriam-webster.com/
Others :-
Nobel Prize http://www.nobelprize.org/
