A neat looking tool from the german demo-scene group .theprodukkt (farbrausch).

[link]

.werkkzeug1 was the first tool to bring procedural textures from the coders to the designers. Now with the release of .werkkzeug3 TE we are making creating procedural textures even easier. Artists get a tool that enables them to freely create procedural texture. No hussle with algorithms or cryptic inputs. Easy operator stacking and control of any parameter.