Bayesian Networks and related issues:
Data and Machine Learning Repositories:
The Decision Support Systems Group at Aalborg University have pointers to several large networks.
The Reinforcement learning repository at Michigan State University.
The UC Irvine repository of databases, domain theories and data generators that are used by the machine learning community for the empirical analysis of machine learning algorithms.
The StatLib site, a system for distributing statistical software, datasets, and information by electronic mail, FTP and WWW.
The DELVE project, a standardized environment designed to evaluate the performance of methods that learn relationships based primarily on empirical data.
The StatLog project is concerned with comparative studies of different machine learning, neural and statistical classification algorithms
The Abbadingo competition for grammar induction.