Common Lisp Machine Learning projects:
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MaLeCoLi, Machine Learning in Common Lisp.
 
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clml, Common Lisp Machine Learning Library.
 
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ML-Progs: More "Research-Level" Implementations of Learning Algorithms
 
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cl-bayesian, Common Lisp routines for Bayesian estimation and analysis.
 
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cl-mlep, a machine learning library for educational purposes
 
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cl-association-rules, an association rule mining library.
 
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cl-online-learning, a collection of machine learning algorithms for online linear classification.
 
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cl-random-forest, a fast implementation of Random Forest for multiclass classification and univariate regression