MLPACK is certainly not the only library trying to implement machine learning methods. Below is a list of competitors:
- Shogun - http://shogun-toolbox.org/
- Mahout - http://mahout.apache.org/
- WEKA - http://www.cs.waikato.ac.nz/ml/weka/
- MDP - http://mdp-toolkit.sourceforge.net/
- MLPy - http://mlpy.fbk.eu/
Below, a table of implemented features should be created.
All k-Nearest Neighbors
Here are other common implementations of AllkNN.
Hidden Markov Models