Santayana’s Works

Santayana’s works at Project Gutenberg
http://www.gutenberg.org/browse/authors/s#a5805

Santayana’s works at Archive.org
http://www.archive.org/search.php?query=santayana

Santayana’s works at Google Books
http://www.google.com/search?tbo=p&tbm=bks&q=inauthor:george+inauthor:santayana&tbs=,bkv:f&num=10

Secondary Sources

Overheard in Seville: Bulletin of the Santayana Society
https://santayana.iupui.edu/santayana-society/bulletin/

or

http://ulib.iupui.edu/digitalscholarship/collections/Santayana

Santayana in the Stanford Encyclopedia of Philosophy

http://plato.stanford.edu/entries/santayana/

Santayana in the Internet Encyclopedia of Philosophy
http://www.iep.utm.edu/s/santayan.htm

Limbo

https://dialnet.unirioja.es/servlet/revista?codigo=11264

A Spanish Language Blog

http://internationalconferenceonsantayana.blogspot.com.es/

Blog on Santayana

http://www.chrisskowronski.com/category/santayanas-guide/

A Santayana Homepage

http://www.george-santayana.org/

Santayana in Wikipedia

http://en.wikipedia.org/wiki/George_Santayana

American Philosophy

Society for the Advancement of American Philosophy
http://www.american-philosophy.org/

Pragmatism Cybrary
http://www.pragmatism.org/

Centro de Estudos em Filosofia Americana
http://cefa.weebly.com/

Groupe d’Etudes sur le Pragmatisme et la Philosophie Américaine
http://pragmatisme.free.fr/

Institute for American Thought
https://iat.iupui.edu/

Charles S. Peirce Society
http://www.peircesociety.org/

Arisbe: The Peirce Gateway
http://www.cspeirce.com/

Institute for Studies in Pragmaticism
http://www.pragmaticism.net/

William James Society
http://www.wjsociety.org/

Josiah Royce Society
http://www.roycesociety.org/

John Dewey Society
http://johndeweysociety.org/

The Mead Project
http://www.brocku.ca/MeadProject/

Critical Editions

Center for Dewey Studies John Dewey
http://deweycenter.siu.edu/

Peirce Edition Project Charles S. Peirce
https://peirce.sitehost.iu.edu/

The Frederick Douglass Papers
https://frederickdouglass.infoset.io/index.php

The Josiah Royce Edition
https://royce-edition.iupui.edu/