Buffalo Ontology Site Information on ontology, on the history of ontology, and on contemporary ontology and its applications.
Descriptive and Formal Ontology An extensive resource site on the development of ontology, especially in the twentieth century.
Metaphysics of Quality Robert M. Pirsig deals with the fundamentals of existence and attempts to provide a more coherent system for understanding reality than current paradigms allow.
PhilSci Archive: Idealist Philosophy: What is Real ? Paper by Axel Randrup defending idealism and arguing that materialism leads to logical contradictions, which closes by considering the implications of this for religion.
Qualia: The Knowledge Argument Aims to establish that conscious experience involves non-physical properties. It is one of the most discussed arguments against physicalism; from the Stanford Encyclopedia by Martine Nida-RĂ¼melin.