OSLOM means Order Statistics Local Optimization Method and it's a clustering algorithm designed for networks.
Download the code (beta version 2.4, last update: September, 2011)
The package contains the source code and the instructions to compile and run the program. You will also get a simple script which we implemented to visualize the clusters found by OSLOM. This script writes a pajek file which in turn can be processed by pajek or gephi.
This is a nice example of how the visualization looks like.
We are also planning to improve the visualization algorithm and maybe to write a java implementation. So, stay tuned!