Machine Learning Library. Includes SVM, Maximum Entropy and Perceptron classifiers under a unique and simple interface. All algorithms support multi-class problems.

OpenNLP MaxEnt (included), libsvm.

Multiclass Perceptron; One-vs-rest Perceptron with uneven and dynamic margins; Maximum Entropy; SVM.

MiLL includes the novel Perceptron algorithm with dynamic uneven (?) margins Dr. Surdeanu designed for his ACE Information Extraction system (see publications).

Mihai Surdeanu and Massimiliano Ciaramita, Robust Information Extraction with Perceptrons, Proceedings of the NIST 2007 Automatic Content Extraction Workshop (ACE07), March 2007.