VRML

See also:

BS Workflow Tools - A wide variety of tools to edit, optimize, reduce, and perform other functions on VRML models. Also available as an SDK.
Chisel - A Java-based VRML optimization tool. Chisel can be installed on multiple platforms.
Flux Studio - Modeling and animation application for creating real-time Web 3D content and virtual worlds. MS Windows XP and Vista versions.
Seamless3d - Free open source 3d modeling software for animated content for the web. Export and import VRML files.
SwirlX3D Editor - A visual authoring system for VRML which provides full VRML editing with the ease of use of a graphical environment.
TriVista Technologies - 3D ImageScene and 3D ImageCube tools for displaying photographs. Free trial versions available. [Microsoft Windows]
Vitruvian Studio - A tool to generate interactive walkthroughs from VRML generated by ArchiCAD.
VizUp - Optimize 3D models with polygon reduction tools. Supports VRML and other 3D formats.
VRMLpad - A professional editor for VRML programming. Licensing is available.
White Dune - White Dune is a low level VRML tool that can read VRML files, display and let the user change the scenegraph and fields.