It's home page is http://common-lisp.net/project/nixies
It's composed by the things I need usually: non linear equations solving, linear algebra on matrices, minimal squares methods, montecarlo method ...
I've programmed this to my own use and for fun. Please, feel free to suggest me new methods to implement. You can mail me at firstname.lastname@example.org.
:(package "http://common-lisp.net/project/nixies/download/patxi2_latest.tar.gz" )
You can see the cldoc documentation at the doc/ subdirectory.