Here it is:
http://volutar.eu5.org/graph.htm
In short: It's a "sound" tool, an editor for creating some white-noise effects based on plain white noise with number of dynamic IIR filters applied. These filters parameters defined as periodic curves (animation 1D Bezier curves). Very easy to create'n'edit, and to get nice background wavy noise.
Could be used with SBaGeN-like software which lack of nice noise background sounds.
It's not fully "open sourced" but I could share algorithms for these filters and parameters curves.
The main goal is to make it a part of a tool for generating/playing background sounds with binaural/isochronic beats like Hemi-Sync.