Scientific gems for Ruby. This is the full installation with rigid version constraints.

While you have to provide the paragraphs, ZombieWriter will arrange the paragraphs into different articles for you to use and edit to your heart's content. You may choose between Machine Learning (Latent Semantic Analysis and k-means clustering) or Randomization.

It is a library that classifies Japanese language. It depends on classifier-reborn and natto.

On-memory text classifier command line tool, based on naive bayes.