The Metaphysics Research Lab 
Developers of the axiomatic theory of abstract objects and relations.
http://mally.stanford.edu/index.html20th World Congress of Philosophy: Metaphysics
Proceedings of the 20th WCP, with an archive of papers contributed in Metaphysics.
http://www.bu.edu/wcp/MainMeta.htm
Big Bang Philosophy
Exploring the consequences of a finite universe.
http://www.bigbang.org/~jpburri/
SOSIG: Metaphysics
Metaphysics resource page from the Social Science Information Gateway.
http://www.sosig.ac.uk/philosophy/metaphysics/
Stanford Encyclopedia of Philosophy: Mereology
The relations of part to whole and of part to part within a whole; by Achille Varzi.
http://plato.stanford.edu/entries/mereology/
A Radical New Metaphysics
A paper by Tom Milner-Gulland presented at the Philosophy As Conference, November 30th, 2002
http://www.geocities.com/gulland68/confmetaphysicspaper.htm
Book I of Hegel's Science of Logic - Being
Hegel's Science of Logic, linked to commentary by Lenin. The Doctrine of Being (Quality - Quantity - Measure).
http://www.marxists.org/reference/archive/hegel/works/hl/hlbeing.htm#HL1_826
Hong Kong Baptist University: Kant's Theocentric Metaphysics
Essay by Prof. Stephen Palmquist answering the question, "Was Kant the destroyer of Metaphysics?"
http://www.hkbu.edu.hk/~ppp/srp/arts/KTM.html
Wikipedia: Metaphysics
A collaboratively edited article explaining several central metaphysical problems: the problem of objecthood, the problem of universals, and the mind-body problem.
http://en.wikipedia.org/wiki/Metaphysics
Philosophy Articles for Debate
Eric Faragher's site, with material on time, freedom, and several other metaphysical problems.
http://www.faragher.freeserve.co.uk/home.html
Metaphysical Review: Archives and Discussion
Archive of this on-line metaphysics journal.
http://www.vivboard.net/~meta/list
Two Contemporary Approaches to Transcendental Arguments
Karl-Otto Apel and Zeljko Loparic on their transcendental arguments in critical relationship with other philosophical trends of the age.
http://limalme.sites.uol.com.br/filosofia/fileng.html
Episteme Links: Metaphysics
A collection of on-line resources.
http://www.epistemelinks.com/Main/Topics.aspx?TopiCode=Meta
