==Get a Free Sage Account== Sage is an open source alternative to Mathematica, Maple, Matlab, and more. You can get a free account at http://sagemath.org. Just click on the "Try Sage Online" link. You can use a Google, Yahoo, or OpenID account to log in. Here's an empty cell that you can practice in.
<sagecell>
- Start typing whatever you want.
</sagecell>