1. EngtaggerEnglish Part-of-Speech Tagger Library; a Ruby port of Lingua::EN::Tagger
2. Wp2txtWP2TXT extracts plain text data from Wikipedia dump file (encoded in XML/compressed with Bzip2) stripping all the MediaWiki markups and other metadata.
3. LemmatizerLemmatizer for text in English. Inspired by Python's nltk.corpus.reader.wordnet.morphy
5. ruby-spacyA wrapper module for using spaCy natural language processing library from the Ruby programming language via PyCall
6. rgingerRGinger takes an English sentence and gives correction and rephrasing suggestions for it using Ginger proofreading API.