TextureLab
Material Maker
Substance Designer
PixaFlux
Filter Forge
Substance Alchemist
TextureWorks
TexGraph
Nodebox
Processing
Vvvv
Vuo
Cinder
Pure Data
TouchDesigner
OpenFrameworks
TextureLab
NodeboxMaterial Maker - Cross-platform, procedural texture generation tool.
Processing - C++ and Java programming at the speed of thought.
Substance Designer - Substance Designer is a node-based non-destructive application for material authoring.
Vvvv - vvvv is a graphical programming environment for easy prototyping and development.
PixaFlux - PixaFlux is a node based image processing application.
Vuo - Design and build live interactive media.