CTheory.net
Probably the best online journal for contemporary cultural theory

International Journal of Baudrillard Studies
International Journal of Baudrillard Studies

On-Line Encyclopedia of Integer Sequences
Weird integer sequences

Helios Homoeopathy
The best homoeopathy store in the UK

Homéopathe International
A brilliant site with many old texts online.

Jacques Derrida Links
A good list of Derrida links

Ereignis
A good list of Heidegger links

MKaku.org
Web site of theoretical physicist Dr. Michio Kaku

SimonSingh.net
Simon Singh's (author, journalist and TV producer, specialising in science and mathematics) website

remote-viewing.com
Site on remote viewing, with, er, great pictures!

Zen Guide
Zen site with great resources and random koans.