Yacas for Macintosh:

Yacas (Yet Another Computer Algebra System) is an open source general purpose computer algebra system. Its strength is in the language in which you can easily write your own symbolic manipulation algorithms.

This site is for a Macintosh OS X version. It uses gnuplot for generating 2D and 3D plots.

I can’t believe I’d never heard of this before. It seems feature complete, and works much like Maxima. The documentation is extensive, too.

Update: Very cool feature for Yacas/OS X — type an expression and highlight it. Go to Services > Yacas > Evaluate and the expression will be replaced with the result. Very useful for, say, doing quick calculations while writing a paper.


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