Supports static analysis of Java programs. It parses Java source code files and class files and builds a complete abstract syntax tree from Java source code files, enriched with name and type analysis information. [Open Source, GPL]
A netfilter-based firewall configurable through config files. May be used as a normal firewall or as a firewall script generator. Integrated with the Snort inline IDS.
Supports several inference algorithms and learning algorithms. Allows simulation of static and dynamic networks, including HMMs, IOHMMs, and Kalman filters. [GPL]
Open-source suite of software tools for research and development using graphical models of probability, published by Kansas State University Laboratory for Knowledge Discovery in Databases (KDD)
Very generic and free (LGPL) Belief Network Framework in C++ - supports a broad range of knowledge and dependency types for network variables and clusters of variables
Based on popular games, the aim is to simulate a world of autonomous agents. The goal of the players is then to program agents or parameter meta-simulators, and then watch them evolve.