“The Apache Mahout developers have released version 0.4 of their
library of scalable machine-learning algorithms now with a variety
of new algorithms, including Spectral Clustering, MinHash
Clustering and a new Naive Bayes classifier, as well as new options
for evaluating clustering results. Many existing code segments were
updated to improve their performance or extend their
functionality.“Apache Mahout offers stable implementations of machine-learning
algorithms which a focus on processing large amounts of data, even
across multiple computers.”