Mathematical Games

Merlin Puzzle (Java)
Lights Out Puzzle (Java)

Books

The Whitman Calculus Book
Jerry Keisler's Infinitesimals-based Calculus Book
A Free Linear Algebra Text from UPS
A More Free Books

Mathematics Pages

Mathematical genealogy
History of Mathematics Home Page
St. Andrews Mathematics Site: History, Biographies, Interactive Curves
The Electronic Journal of Combinatorics
Mathematical Quotation Server
University of Pennsylvania Electronic Textbook
PWS Calculus Modules OnLine
Fractals & the Mandelbrot set
ODE Phase Plane Plotter (Requires Java)
Function Plotter (Java)
Abstract Algebra Online
The Matrix Market
Sloane's On-Line Encyclopedia of Integer Sequences
Mathematician Trading Cards
Prefix names for really big and really small numbers
A short course in trigonometry (Java)
The Geometry Applet (Java)
Euclid's Elements (Java)

Other Mathematics Departments

University of Leeds
Smith College
St. Olaf College
UC Denver
University of the Pacific
Vassar College