* [RSyntaxTree v1.10.0](https://github.com/yohasebe/rsyntaxtree) – Graphical syntax tree generator for linguistic research.

* [EngTagger v0.4.5](https://github.com/yohasebe/engtagger) – Probability-based English part-of-speech tagger that assigns tags using a dictionary and conditional probabilities, extracting noun phrases and related word lists.