Crab is a ﬂexible, fast recommender engine for Python that integrates classic information ﬁltering recommendation algorithms in the world of scientiﬁc Python packages (numpy, scipy, matplotlib).
Guia para Sistemas de Recomendação
Guide to Recommender Systems
ruby/redis based recommendation engine (collaborative filtering)
Aelius is a suite of Python, NLTK-based modules and language data for training and evaluating POS-taggers for Brazilian Portuguese and annotating corpora in this language variety.
Tools used to generate the SciPy conference proceedings
scikit-learn main repo