General philosophy

 Stanford Encyclopedia of Philosophy
 Internet Encyclopedia of Philosophy
 Mount Allison Library Resources in Philosophy
 PhilPapers.org — Where philosophers share their research — often a great place to see what the current debates and discussions are.
 Jonathan Bennett’s Early Modern Texts — Texts in early modern philosophy, re-written in an updated, clear language.
 Philosophy Bites podcasts
 History of Philosophy without any gaps podcasts

Professional associations
(Note: These often have resources about careers in philosophy, best practices within the discipline, and information about graduate schools.)

 Canadian Philosophical Association
 American Philosophical Association
 Society for Phenomenology and Existential Philosophy 
 Society for the Advancement of American Philosophy
 Society for Women in Philosophy
   Canadian Society for the History and Philosophy of Science    

Useful philosophy blogs and magazines

Blogs
 Feminist Philosophers
 Flickers of Freedom (free will blog)
 Leiter Reports APPS (Art, Philosophy, Politics, Science)
 PEA (Philosophy, Ethics, Academia) Soup
 Philosophy of Brains (philosophy & science of mind)
 Prosblogion (philosophy of religion)

Popular magazines
 Philosophy Now Magazine
 The Philosophers’ Magazine

Applied Ethics (Bioethics, Environmental Ethics, and other)

 University of Toronto Joint Centre for Bioethics
 International Journal of Feminist Approaches to Bioethics (Also has a blog)
 International Society for Environmental Ethics
 Center for Environmental Philosophy
 Environmental Ethics Journal Index 
 W. Maurice Young Centre for Applied Ethics, UBC 
 Biomedical Ethics Links at UBC
 McGill Clinical Trials Research Group
 National Center for Genome Resources 

Other online resources

The Environment Directory
The World Bank
Institute for Global Ethics
Women's Environment and Development Organization
Linkages (environmental and development policy makers)
New York Review of Books
Episteme Links
Internet Directory of Botany