7. RaingramsA flexible and general-purpose ngrams library written in Ruby. Raingrams supports ngram sizes greater than 1, text/non-text grams, multiple parsing styles and open/closed vocabulary models.
8. ScmRuby interface to common SCMs
9. ParametersParameters allows you to add annoted variables to your classes which may have configurable default values.
10. SpidrA versatile Ruby web spidering library that can spider a site, multiple domains, certain links or infinitely. Spidr is designed to be fast and easy to use.
17. libBERTA C library for encoding and decoding BERT (Binary ERlang Term)
19. kramdown-manA Kramdown convert for converting Markdown files into man pages.
23. tdiffCalculates the differences between two tree-like structures.
24. rprogramA library for creating wrappers around command-line programs.
25. multi markdownmulti_markdown allows projects to use a wide variety of Markdown Processors, without having to depend on a specific one.
26. sketchesA Ruby library for live programming and code reloading.
29. dm-visualizerVisualizes the Models, Properties and Relationships defined in a DataMapper based Ruby project.
31. gscraperA web-scraping interface to various Google Services.