Directory of Open Access Journals -Provides access to over 1500 +  learned journals covering all major disciplines.

 http://www.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.bentham.org/open/a-z.htm

 High Wire Press- Earths largest free-full science archives (journals) 320 journals

 http://highwire.stanford.edu/

 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/

 Down to Earth

 http://www.downtoearth.org.in 

 Indian National Science Academy journals (INSA)

 http://www.insa.nic.in/ 

 Indian Journals

 http://indianjournals.com/ijor.aspx

 Iete Journals (institution Of Electronics And Telecommunication Engineers.)

 http://www.ietejournals.org/

 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

 49 Full Open Access Stm Journals

 http://www.hindawi.com/journals/

 Digital Learning 

 http://www.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