Last updated December 12, 2009.
- Cosma Shalizi's Notebooks
- Largely collections of papers on a vast range of topics.
- Physics Documents at Av8n
- A collection of essays on a variety of aspects of physics and thinking.
- No Nonsense Self Defense
- The most comprehensive and sophisticated resource on the internet on dealing with crime, violence, and martial arts training.
- Archive of Edsger W. Dijkstra's writings
- Dijkstra was one of the great minds in computer science, and one of the most opinionated. You may not always agree with him, but it's worth knowing what he thought and why.