DOAJ Directory of Open Access Journals -Provides access to over 1500 + learned journals covering all major disciplines: http://doaj.org/
Indian Academy of Sciences (IAS) –11 free Indian online journals: http://www.ias.ac.in/
NISCAIR Full Text Journals: http://nopr.niscair.res.in/
Bentham 175 open access journals: http://www.benthamscience.com/open/a-z.htm
High Wire Press- Earths largest free-full science archives (journals) 320 journals
http://home.highwire.org/
Institute of Physics electronic journals (IOP) 60 e-journals: http://iopscience.iop.org/journals
Journal of the Indian Institute of Science: http://journal.library.iisc.ernet.in/index.php/iisc
Down to Earth: http://www.downtoearth.org.in/
Indian National Science Academy journals (INSA): http://www.insa.nic.in/INSAuth/Default.aspx
Indian Journals: http://www.indianjournals.com/ijor.aspx
IETE Journals (Institution of Electronics and Telecommunication Engineers)
http://www.iete.org/publications.htm
Open j-Gate 4805 Open Access Journals: http://jgateplus.com
Open Access Journals Search Engine: http://www.oajse.com/
Medknow Publications Journals: http://www.medknow.com/
Digital Learning: http://digitallearning.eletsonline.com/
Directory of Open Access Repositories: http://www.opendoar.org/
Journal of Nanotechnology: http://www.hindawi.com/journals/jnt/
Nano Technology Open Access Journals:
http://www.nanowerk.com/nanotechnology/periodicals/open_alist.php?letter=A
National Digital Science Library: https://nsdl.org/