The Metaphysics Research Lab  
   Developers of the axiomatic theory of abstract objects and relations.
   http://mally.stanford.edu/index.html

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://sites.uol.com.br/limalme/filosofia/fileng.html

Metaphysics, Multiple Meanings  
   This site distinguishes popular and academic metaphysics, and provides links related to each.
   http://websyte.com/alan/metamul.htm

20th 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/

Episteme Links: Metaphysics  
   A collection of on-line resources.
   http://www.epistemelinks.com/Main/Topics.asp?TopicCode=Meta

SOSIG: Metaphysics  
   Metaphysics resource page from the Social Science Information Gateway.
   http://www.sosig.ac.uk/philosophy/metaphysics/

Naive Metaphysics: A Theory of Subjective and Objective Worlds  
   Supporting material for the book written by Geoffrey Klempner. Two extracts are provided; the preface, which explains the unusual circumstances and goals the author had whilst writing the book; and the first chapter, which consists of a long meditation o
   http://www.shef.ac.uk/uni/projects/ptpdlp/pathways/book.html

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

Pete Mandik's Objectivity Home Page  
   A resource for those interested in the philosophy of objectivity and subjectivity.
   http://www.wpunj.edu/cohss/philosophy/faculty/mandik/objectivity.html

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

Philosophical Apologetic  
   A philosophical apologetic, or argument from pure reason in answer to Immanuel Kant's challenge. Pure Philosophical Argument for the Existence of a Supreme Being (consisting of five a priori principles).
   http://www.philosophical-apologetic.com

Kant's Theocentric Metaphysics  
   Essay by Prof. Stephen Palmquist on Kant's Theocentric Metaphysics (Answers 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

University of Bristol: Metaphysics  
   A guide to the topic that introduces its major themes and suggests sources for further study.
   http://www.bris.ac.uk/Depts/Philosophy/UG/Studyguide/meta.html

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