University and college departments and institutes of philosophy, many of them offering advanced degrees in philosophy. Most sites have program descriptions, and links to faculty and other resources.

Philosophy of art, or aesthetics, is the branch of philosophy examining the nature of art and of the experience of art. Art, in this context, is broadly conceived as including the visual arts, literature, poetry, music, and dance.

A tradition stemming from the early 20th century, placing a strong emphasis on clarity and rigorous debate. It is conventionally opposed to "Continental Philosophy."

The search for wisdom through open debate. Sites submitted to this category should be in some way interactive and accommodate public discussion of a philosophical nature.

Link collections, annotated directories, and search engines for philosophy and related areas.

Philosophy done in the traditions of Eastern thought, namely those traditions which have arisen in South and East Asia.

This category is devoted to the teaching of philosophy. It is supposed to provide resources for philosophy teachers, mostly at the college and university level, including sites on pedagogy in philosophy teaching, the teaching of particular subject areas, syllabi, handouts, etc. Philosophy sites which are of use mostly for students of philosophy, including online courses and course websites with substantial philosophical content should go in the most appropriate subcategory of Society/Philosophy.

Information about the job market in philosophy, job listings.

Works of philosophers or others dealing with the limits, sources, nature and methods of human knowledge.

Ethics is the study of what's right and wrong (the word "morality" has a very similar, if not identical meaning) - as in "Stealing is wrong", not as in "2+2=3 is wrong". As with other branches of philosophy, there is virtually nothing in ethics on which everyone agrees, not even the foundations.

Western philosophy has a long and varied history, dating back to the pre-Socratic philosophers of ancient Greece. The category for history of philosophy is dedicated to sites and pages which deal with the history of philosophy in general or a separate period, rather than with a particular topic or a particular philosopher.

Individual academic journals on philosophy, and directories of journal websites.

Metaphilosophy is the study of the subject, matter, methods and aims of philosophy. It is the philosophy of philosophy.

Metaphysics is a primary subject area in philosophy which investigates the nature, constitution, and structure of reality. It also deals with notions such as causation, time, modality (necessity and possibility), particulars and universals, and the relation of mind to body.

Distinct philosophical schools of thought.

Resources and archives of academic philosophical writings, both historically and in recent times, including essays and dissertations.

Organizations and associations related to philosophy.

This category is for issues that do not fit in any of the other Philosophy categories. It is a home for those whose philosophical ideas do not fit comfortably into the mainstream.

This category includes sites with philosophers as their subject. Content may include biographical and bibliographical information, articles, interviews, electronic texts, mailing lists, and secondary literature.

Philosophical discipline that seeks to unify the several empirical investigations of human nature in an effort to understand individuals as both creatures of their environment and creators of their own values.

Philosophy for Children aims to develop and preserve the critical, creative and caring thinking and attitude that is natural to children. Dialogue, e.g. on truth, competition, ethics or logic, is one of the tools that can be used.

Devoted to this branch of philosophy, also called social philosophy.

Philosophy of language is the study of philosophical issues that arise due to the language based nature of discourse and argument. It is dominated by philosophical analysis, the branch of philosophy that occupies itself with what the structures of language tell us about the concepts we deploy in communicating. Philosophical analysis dates back to the Pre-Socratics , and was first made systematic in Aristotle's Organon, but it was with the revolutionary new developments in mathematical logic inaugurated by Frege that philosophical analysis assumed the central importance in philosophy that it does today.

Analytical philosophy is the school of philosophy which ascribes most importance to the philosophy of language, and it is in analytical philosophy that the so-called `linguistic turn' took place: this is the idea that long standing controversies in philosophy about the nature of the world and of knowledge can be settled by attention to the use of the relevant concepts in language. But even outside analytical philosophy, philosophy of language is important: linguistic issues take centre stage in the philosophical hermeneutics of Heidegger and Gadamer and in Derrida's Deconstruction, in phenomenology issues about privacy best formulated in linguistic terms are of crucial importance, whilst in cognitive science the debate about the nature of concepts revolves about matters of content that originated in the philosophy of language.

Philosophy of religion is a branch of metaphysics devoted to the analysis of religious phenomena, beliefs, movements etc. It is mostly concerned with evaluating religious claims, e.g., claims regarding the definition, the existence, "nature", and activities of God.

The philosophy of science is concerned with the philosophical interpretation and study of the natural sciences, in particular, physics, biology, and mathematics.

Any sites which predominantly or exclusively provide information on commercial activities related to philosophy will be listed here. These include philosophical consulting services, booksellers, etc.

Collections of secondary articles on philosophy, like the Internet Encyclopedia of Philosophy and the Stanford Encyclopedia of Philosophy, philosophical dictionaries, and the like.

Pluridisciplinarity concerns studying a research topic not in only one discipline but in several at the same time. Interdisciplinarity concerns the transfer of methods from one discipline to another. As the prefix "trans" indicates, transdisciplinarity concerns that which is at once between the disciplines, across the different disciplines, and beyond all discipline. Its goal is the understanding of the present world, of which one of the imperatives is the unity of knowledge.

Weblogs devoted to philosophy from a scholarly approach.