Joined: May 2002
...is a central archive of scientific literature that is freely available to the public without subscription. Sometimes the whole journal is free, sometimes the material is made freely available after 6 months.
Oftentimes you will have to complete a free registration to access free content.
I believe this is the current list of journals with free online content:
Top journals from this list for evolution-related stuff:
Proceedings of the National Academy of Sciences of the United States of America
(also at http://www.pnas.org )
Journal of Biology
A free article from the last one, advocating open access to scientific lit -- a logical position, considering how most of this research is taxpayer-funded:
Open access to the scientific journal literature
J Biol. 2002; 1(1): 3
A list of journals with full-text access for subscribers (the subscribers are usually university libraries, generally they are available to anyone within the University's edu domain) tied into the PubMed search engine is here:
PS: Another important journal:
Archives back to 1996:
From 2000 on:
Several critques of ID have been published in Evolution: link to search results