General

• Internet Encyclopedia of Philosophy

• Stanford Encyclopedia of Philosophy

 

Metaphysics

• Metaphysics (General)

 

Logic & Philosophy of Science

• Basic Logic (Critical Thinking Web)

• Kuhn's The Structure of Scientific Revolutions (synopsis)

 

Epistemology

• Epistemology (General) 

 

Ethics

• Ethics (General)

• "Accepting Responsibility Responsibly" Ethics in Business (ethics.org)

• "The Importance of Ethical Culture" Ethics in Business (ethics.org)

 

Social & Political Philosophy

• Political Philosophy

 

Aesthetics

• Aesthetics (General)