The Skeptics Dictionary - top notch site by a first rate philosopher! - I visit this site often.

Skeptics Society

Positive Atheism - excellent Archive of essays

Landover Baptist Church - hilarious religious satire

Sonoma State University Center for Critical Thinking

World Wide Skeptical Web

James Randi Home Page

The Left Hemisphere

Bertand Russell Archives

Noam Chomsky Archives

Michael Parenti Political Archive

The Third World Traveler - a refreshing alternative to the corporate media

Counterpunch - the best news alternative to the right wing bias of the corporate media with journalists who know how to write and who are not subjected to "gag" rules.

World of Richard Dawkins

Skeptical Inquirer 

Skeptic Magazine

Free Inquiry Magazine

Disinformation Web

Prometheus Books

Online Works of Howard Zinn - The best contemporary historian

A.C. Grayling's Website - A first-rate contemporary philosopher

Critical Thinking on the Web

Critical Thinking Across the Curriculum (Material on Logic and Argumentation)

The Freethought Debater

ZMag - Huge Archive of radical writings

The Onion - superb socio-political satire

The Darwin Awards - a chronology of the stupidity of homo sapiens