Please click on the link.

Open Access Link
HighWire Press http://highwire.stanford.edu/lists/browse.dtl
Science Alert http://scialert.net/
Open access e-journals http://scialert.net/
Open-J Gate http://www.openj-gate.com
NIH library http://nihlibrary.nih.gov/Pages/default.aspx
Jane-semantics based article search http://jane.biosemantics.org
Online books NIH http://www.ncbi.nlm.nih.gov/sites/entrez?db=books