Open Access Library

Open Access Library (OALib) search engine features free access to 2,011,936 academic articles. And this number is estimated to increase in the near future.

"... free availability on the public internet, permitting any users to read, download, copy, distribute, print, search, or link to the full texts of these articles, ... or use them for any other lawful purpose, without financial, legal, or technical barriers other than those inseparable from gaining access to the internet itself."