GraphMind... soon to come on the V-Pulse
Links:
[1] http://linux.philosweb.com/drupal/category/it/collaboration
[2] http://linux.philosweb.com/drupal/category/it/software/foss
[3] http://linux.philosweb.com/drupal/category/it/internet
[4] http://linux.philosweb.com/drupal/category/it/open-source-foss
[5] http://linux.philosweb.com/drupal/category/it/visualization
[6] http://linux.philosweb.com/drupal/category/it/web