**General Links**

- Mathematical Encyclopedia by Eric Weisstein, This is the most famous and complete mathematical dictionary on the Web
- Ask Dr. Math
- Math Forum: Math Resources by Subject
- Cut the Knot!, Interactive Mathematics Miscellany and Puzzles by Alexander Bogomolny
- Math Magic, Nice collection of math puzzles and links
- My Favorite Puzzles, Collection of Math Puzzles and discussion
- Geometric Series
- Tanya Khovanova's Math Blog

**Cryptography**

- A great site with lots of historical ciphers
- A huge overview of cryptography
- The Prime number home page
- The first 1000 prime numbers

**Error correction and compression**

**Probability and statistics**

- The Probability Web
- Probability by Surprise: it has a birthday problem applet on it
- Cut the Knot Probability Problems (this includes some Monty Hall stuff)
- Java Demos for Probability and Statistics
- Introduction to Probability Models has a rolling dice applet, and there's also a normal distribution applet on:
- Normal Distribution Calculator

**Birth, growth, death and chaos**

- Nonlinear Science FAQ
- The Chaos Hypertextbook
- Some applets for dynamical systems
- The Dynamical Systems and Technology Project at Boston University
- Chaos Gallery

**Graph Theory**

**Geometry and motion control**

- The Hexapod Robot on youtube
- Escher and the Droste effect
- Escher Web Sketch
- Tessellating Animation
- Wallpaper Groups
- Tessellate!

**Voting and social choice**