Andrew Top
Linfinity (Dynamic 3D Scene Graphs)
Download Scene Composer & Viewer (Windows Installer)
An article explaining the implementation can be found on gamedev.net.
Video Demonstration
Screenshots
A more complicated scene with solar systems, planets, cities and people. New galaxies can be found in the eyes of the people.
An adaptation of the classic fern fractal within this dynamic scene graph system.
Sierpinski's Gasket in 3D.