Last night I downloaded a LaTeX package. That's 'lay-tech', not the stuff you find in exam gloves or trashy clubwear. One of my purposes here is to play with free software that can be used to produce really nice work. LaTeX is a kind of markup language used to typeset documents. Actually, it would be more accurate to say that it prevents you from having to typeset documents. The idea is to simply write the content, and LaTeX knows how to format it properly, so you don't fiddle with it. It is also very good for scientific works because it handles the display of equations well. I am planning on using LaTeX to redo the Bayes' Theorem paper I posted previously. We shall see how it goes.
Valve is giving away the Portal 2 soundtrack on the Portal website. You should go get it, for science. Portal 2 Soundtrack
An ebook, Think Stats: Probability and Statistics for Programmers, teaches statistics through hands on programming oriented exercises. You can find a data set used in the book here.
Microsoft Research just released Sho, a marriage of .NET and Python. I would try it out, but I need to upgrade before I can run it.