Twittering with Mathematica

Mathematica is computational software. It has some powerful graphing capabilities and can be used to write technical reports. It can also handle very large sets of data. You write code to use it, and you can code C applications to access Mathematica. It is pretty powerful.

It is mainly used by scientists and engineers. I think you can get a home edition for around $300.

Now there are some web based functionality that can be seen here: http://integrals.wolfram.com/index.jsp as well as it being the back for wolframalpha or so I am told.