cl-machine-learning is a project with assorted supervised, unsupervised, and reinforcement learning algorithms written in Common Lisp.
As of summer 2009, the project is barebones. We have a support vector machines library (cl-svm).
To download CL-SVM, use the folloing git command.
git clone http://common-lisp.net/projects/cl-machine-learning/git/cl-svm/.git
The library is currently released under the LLGPL.
Keep up to date on the progress of the project on our low-traffic mailing list, cl-machine-learning-devel.