The NetVis Module is a free, Open Source, Web-based tool designed to simulate, analyze, and visualize social networks using data from csv files, online surveys, and geographically-dispersed work teams.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
Some minor bugs were fixed. The capability to create or upload electronic
discussion group data was added, which will allow you to visualize threads and
posts from an online forum.