QTfeedback offer users a simple feedback effect that will help them generate interesting image results in realtime. Create some extraordinary images with this tool.
QTfeedback Features:
1. Coloring sources with your own gradients (alphachannel upported)
2. Three different Feedback Methods (*)
3. Heightfield as one Feedback Plane (using libnoise)
4. Make Screenshots of your Feedback Fractals
5. some more features such as texture distortion ...

The license of this software is Free, you can free download and free use this graphing software.