"Vizster is an interactive visualization tool for online social networks, allowing exploration of the community structure of social networking services such as friendster.com, tribe.net, and orkut."
Features
* Easy to use Python API
* Flexible data import options
* Scalable
* Built-in reports
* Built-in data export capabilities
* Open source - easily extended
* Fast processing time (efficient use of graph algorithms)
C. Scholz, M. Atzmueller, and G. Stumme. Proc. Fourth ASE/IEEE International Conference on Social Computing (SocialCom), Boston, MA, USA, IEEE Computer Society, (2012)