The NetVis Module is an open source web-based tool for researchers to simulate, analyze, and visualize social networks using data from online surveys, imported csv files, and electronic discussion groups.

A free Java applet for unclassed choropleth maps and cartograms (continous area and circle). Data: .txt, geometry: .shp and other formats. Thematic generalization by a polygon filter.

Photorealistic landscape rendering application using ArcView or MapInfo data for precise placement of trees, and roads. [Windows]

Realistic flight and terrain visualization with full 6 degrees of freedom of motion. Features simultaneous 3-D view and map views, and saving flights as movies or VRML files. [Windows]

Provide photorealistic landscape services and develop visualization software for same.

A free 3D viewer for Digital Elevation Model (DEM ) and Digital Line Graphs (DLG ) maps. (free, with code) [linux, requires GTK+]

Combine terrain visualization and thematic mapping in a dynamic 3D environment, allowing you to navigate geospatial data in near-real or real time. [Win9x/NT]

A digital elevation model viewer for ArcInfo Grid ASCII export files. Can combine it with other data such as other DEMs and/or Jpeg/Gif images. (free, with code) [Java]

Website of the official Web3D Consortium working group, with the goal of developing tools and recommended practice for the representation of geographical data using the Virtual Reality Modeling Language (VRML).

openGL 3D GIS data viewer with real time animation, zoom, and Fly-by capabilities. [Windows]