PixaFlux is a node based image processing application. PixaFlux creates and edits images in a non destructive way, using a node graph to organize the workflow without restrictions of size, position or color mode.
Substance Designer is a node-based non-destructive application for material authoring. Edit complete texture sets fast with the non-linear workflow and see your changes apply simultaneously to all your outputs.
TexGraph is a procedural texture creation tool that let you create textures by connecting nodes in a graph. It is designed to be similar to other tools in the market but at the same time be very simple and easy to use and extent by users.