Definitely. Houdini is nodes everywhere. Nodes within nodes within nodes :-) Could maybe add Softimage ICE to that list. Also check out Grasshopper3D for proc

Definitely. Houdini is nodes everywhere. Nodes within nodes within nodes :-) Could maybe add Softimage ICE to that list. Also check out Grasshopper3D for procedural modelling. Blender has a regular flowgraph for it's compositor and shading networks (and soon for particles, I think). Plus there's the logic bricks thing for it's game engine.