Encyclopedie.net

The LoveToKnow Free Online Encyclopedia
Browsable. Based on the eleventh edition of the Encyclopedia Britannica, first published in 1911.
www.1911encyclopedia.org/

Public Library of Science
Advocates the free distribution of science and medical published articles.
www.plos.org/

Stanford Encyclopedia of Philosophy: Incompatibilist (Nondeterministic) Theories of Free Will
Randolph Clarke's survey of theories of freedom according to which it is inconsistent with causal determinism.
plato.stanford.edu/

The Proceedings of the National Academy of Sciences Online (U.S.)
PNAS. Beginning January 2002, PNAS research articles and papers published online before print in PNAS Early Edition are available only to paid subscribers for six months. All articles from 1990 through 2001 remain freely available.
www.pnas.org/

Free Medical Journals
Lists a large number of medical journals that currently provide free full-text access on the WWW.
www.freemedicaljournals.com/

ArXiv.org
An Open Archives Initiative (OAI) compliant archive of electronic preprints in physics, mathematics, computer science, and non-linear sciences. Created by Paul Ginsparg in 1991, it is one of the oldest archives of free online scholarship.
arxiv.org/

Free Full-Text Science Archives
A directory with annotated links to institutional full-text scientific archives.
highwire.stanford.edu/

CCSD: Hyper Article Online
An interface for submitting scientific papers to the article database of the french Centre pour la Communication Scientifique Directe. Papers in mathematics, physics, information science are instantly and automatically directed to "arXiv" [bilingual site in english/french].
hal.ccsd.cnrs.fr/

Nature and Science
International academic journal on natural and social sciences. Includes publications, papers, database and templates.
www.sciencepub.net/

Brain
One of the eldest neurological journals. Leading studies in neurological science and practical clinical articles. Free access to editorials and abstracts.
brain.oxfordjournals.org/