It is a Blender addon to help in creating lightning and electrical effects. The generator simulates real physical effects and can be used for Laplacian phenomenon beyond lightning. The script is still very much in development but the most recent release provides much needed functionality including „container insulators“, which allow „lightning in a bottle“ effects.
Video how Laplacian Lightning Generator Blender 2.5 looks like
Source and original article: blendernation.com