NLP software:
- CRFTagger: English part-of-speech tagger built on top of conditional random fields.
- CRFChunker: English phrase chunker built on top of conditional random fields.
- JTextPro: Java-based English text processing tool (including sentence boundary detection, word tokenization, part-of-speech tagging, and phrase chunking), all built on top of maximum entropy and conditional random fields.
- JVnSegmenter: Java-based Vietnamese word segmentation tool built on top of conditional random fields.
- JVnTextPro: Java-based Vietnamese text processing tool (including sentence boundary detection, tokenization, word segmentation, and part-of-speech tagging) all built on top of maximum entropy and conditional random fields.
Machine learning software:
- FlexCRFs: Flexible conditional random fields for segmenting and labeling sequence data. FlexCRFs, written in C/C++, was designed to deal with hundreds of thousand data sequences and millions of features. FlexCRFs support both first-order and second-order Markov properties. A parallel version, PCRFs, is also available for running conditional random fields on massively parallel systems.
- GibbsLDA++: A C/C++ implementation of latent Dirichlet allocation using Gibbs sampling technique for parameter estimation and inference. It is fast and designed to analyze hidden/latent topic structures of large-scale discrete data collections (e.g., huge collections of text/Web data).
Text/Web mining software:
- PEWeb: A Win32 implementation of product description extraction from the Web.