KALDI: Decision tree internals

Recurrent Neural Network Language Models

Deeplearning4j - Open-source, distributed deep learning for the JVM

Hac - A Java class library for hierarchical agglomerative clustering

Tangle: API Reference

Blazing fast AST generation using boost::spirit

Deep Learning, NLP, and Representations

Parse::RecDescent - search.cpan.org

An Introduction to the Boost Spirit Parser framework - CodeProject