Maths

SocaLabs has introduced Maths, a freeware VST/AU plugin for processing stereo audio signals based on user-definable math formulas.
Maths is definitely not your standard audio effect. Instead of using knobs and sliders to shape the sound, the user should instead input a formula which will tell the plugin what to do. It is possible to define up to four automatable parameters which can be adjusted using the four provided knobs or via
DAW automation. Maths supports 25 built-in functions, fourteen operators, and one ternary operator.

http://socalabs.com/developer-tools/maths/