The Formulas Rendering Plug-In for the GIMP 2 is a simple plugin that allows you to change the values of each color channel of each pixel of a layer by using mathematical expressions. It is able to handle RGB* and Gray* images. Available operators are: +, -, *, /, ^, and %.
It generates an animation from a text layer. The effect looks like a laser, burning the text into the background.
The animation can be saved as animated GIF afterwards. It is intended to be used on websites.