The aim of this project is replicate the best of Sage/Mathemica/WolframAlpha/Matlab/Octave in the browser. It aims to make programs like this easy and available for all.
As this is entirely javascript based, with no server components, you can just go to: http://anirudhjoshi.github.com/math.js
If you'd like to use this offline just download the following zip file, and open up,
index.htmlin your browser of choice: [ DOWNLOAD LINK ]
If you'd like to hack on this, fork, create your own feature branch, and send in a pull request with comments/code.
I like to use,
git clone --depth=1 git@github.com:username/math.js
to speed up the download process.