 A free cross-platform runtime implementation of VRML is available in OpenVRML.Its libraries can be used to add both VRML and X3D support to applications, and a GTK+ plugin is available to render VRML/X3D worlds in web browsers.In the 2000s, many companies like Bitmanagement improved the quality level of virtual effects in VRML to the quality level of DirectX 9.0c, but at the expense of using proprietary solutions.