Sometimes you will write a presentation in something that is not LaTeX or design a poster and you want to include equations. These equations you want to be nicely typeset with LaTeX, but they need to be standalone graphics.
This blog post describes a script which will take an input file of the LaTeX code for the equation and process it into either a bitmap (png) or vector (pdf) graphic.
I have previously blogged on this topic using a different method, here. However, I now prefer this method as it is easier to use and faster to do. It also uses much simpler files for the equations and makes it easier to get a coherent look across all the equations in your presentation or poster by using a common preamble.