Sage: a free, open-source complex math tool

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| A former assistant professor from Harvard, now at UofW, Dr. William Stein,
| and several students, have created a new open-source complex math solving
| tool called Sage.

More details here:

Free Software Brings Affordability, Transparency To Mathematics

There's also Octave and others.


[A different] Sage embeds open-source database into software

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| The Sage Group has signed a global agreement with MySQL AB which enables
| Sage to embed the open source MySQL database into its product portfolio.
| [...]
| ... Vogelberg, Sage Group chief technology officer, said, "We chose
| MySQL as it proved to be the most powerful and versatile programme
| available..."