SimData-CSP is a C++ library for data management in simulations that provides dynamic object creation, automatic binding to external static data at runtime (using precompiled XML), and many data classes useful in simulations (with full Python bindings).
Xi3D is an X3D renderer and browser for 3D Web content. It contains compliant parsers for VRML'97 types, a java scenegraph, XML bindings using SAX2, a content converter, full runtime and event model, DOM Level 2, vecmath