Modern Scene Graphs
Inventor / OpenInventor - event handling via fields, routes (dataflow wiring), widgets e.g., manipulators, ExaminerViewer
VRML(X3D)- web-based file format, based largely on Inventor, multiple browsers, no reference implementation
IRIS Performer - strong parallel support, provides analysis tools, extensive LOD and performance tuning
Java3D - geometry compression, VR support
Fahrenheit(?) - FSG based on Performer, FLM based on OpenGL Optimizer and HP DirectModel, COM based
Application-specialized, e.g., LM E, G E