~ 120 line self-contained Python script that is a starting place for makeing pretty graphs of equations. Just copy and paste truthygraph.py, and change the equation(x, y) function to your function of choice.
~ A simple graphing app which lets you visualize math functions... not just where they are equal (as most graphing software does), but also where both sides of the equation are not exactly equal. Life isn't all black and white - there are lots of pretty colors in the liminal spaces.