Thread: What resources of open access do you use?

We develope scientific social network and now there are registered thousands of scientists and students mainly form russia.

Very often we face a question where in internet can one get papers of given specialization without fee. Here in russia this question if very actual, because of very poor funding.

So my question is what resources of open access do you use?

Please share a couple of most interesting links and point out your specialization.
This information will be gathered up and be seen by a lot of scientists and student in Russia. Also, I hope, your links are interesting to your collegues here.

Thank you for cooperation!

• Directory of Open Access Journals
• Public Library of Science
  A series of journals with all their full-text articles for free
• arXiv
  Free full-text articles in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and Statistics
• The Open Behavioral Science Journal
  “The Open Behavioral Science Journal is an Open Access online journal, which publishes research articles, reviews, and letters in all areas of behavioral science. The scope of the journal includes cognitive science, and the neuroscience, biology, psychology, pharmacology, and genetics of behavior.”