Birthday of the Smiley :-)
Finite mathematics & Applied calculus resource page, from Stefan Waner and Steven R. Costenoble, Department of Mathematics, Hofstra University, includes many tutorials and tools which might be useful
Donald Knuth talking about how TeX came about
The Man Who Loved Only Numbers - 53 minute lecture by Paul Hoffman recorded in 2002; Paul Hoffman also wrote a book with the same title The man who loved only numbers : the story of Paul Erdos and the search for mathematical truth
Website for the course: Math alive by Professor Ingrid Daubechies at the Department of Mathematics, Princeton University. Six topics are included: cryptography; error correction and compression; probability and statistics; birth, growth, death and chaos; geometry and motion control; and voting and social choice. They are designed for those who haven't had college mathematics but would like to understand some of the mathematical concepts behind important modern applications. Lecture notes, problem sets and solutions are all provided.