a free plugin for Photoshop that allows you to plot Curves Adjustment layers using mathematical definitions.

A good fit for: Graphic designers
Supported by: Photoshop CS6 and CC
Cost: Free
A Photoshop plugin that you may experiment with a lot! This really helpful plugin gives graphic artists a variety of choices to change patterns, gradients, and layers, resulting in the creation of whole new designs. The plugin enables you to construct your own Javascript custom functions, combine Parametric Curves on top of Gradients, and apply Curves to Gradients as a source for Depth and Bump Maps or Displacement Maps to create a 3D effect.