William Stein - SAGE, software for algebra and geometry experimentation

- building the car (not the wheel)

- distribution of free open source math software (self-contained!)
- Python library
- new interface to standard mathematics software

- very customized IPython
- 2/3 = 2/3!
- includes Maxima for symbolic computations
- includes ray-tracer

- notebook AJAX interface
- uses jsmath for output (http://www.math.union.edu/~dpvc/jsMath/)
- images (bitmap or svg) created as side effects are displayed in browser

- can run as webserver
- has history, text output...

- group theory: GAP
- symbolic and calculus: Maxima
- commutative algebra: Singular
- Number theory: PARI, MWRANK, NTL
- graphics: matplotlib
- linear algebra: Numeric
- programming: Python
- interaction: IPython, notebook

- written in Pyrex to increase speed of arithmetics

- speed improvements planned