modular toolkit for data processing

http://mdp-toolkit.sourceforge.net/

interesting project with a number of capabilities. python code for pca, ica, slow feature analysis, manifold learning methods ([Hessian] local linear embedding), classifiers, factor analysis, rbm, etc.

according to the 'intro to scipy' talk at pydata 2012, it has the fastest pca available in python (even if the interface is more difficult than scipy svd or sklearn.decomposition.PCA).