Offers a Ruby to PHP compiler, allowing a developer to write Ruby code and compile it to be run with PHP.

Ruby tools: find2 replaces find.rb, getoptlong library to parse command line options. Other free software.

Fast Ruby module with Porter stemming algorithm; a process to remove commoner morphological and inflexional endings from words in English; main use is as part of term normalisation process usually done when setting up Information Retrieval systems.

Logs results of automated unit tests, and displays results in HTML view. RSS feeds track every test run.

Projects (Tar2RubyScript, RubyScript2Exe, RubyWebDialogs, AllInOneRuby), well documented; tutorials (Distributing Ruby Applications, Distributing Rails Applications, Monitor-Functions), Code Snippets.

Ruby O-o Compiler construction toolKIT; easy-to-use, written in and emits Ruby code. Current focus: 'front-end' phases of compiler construction; generates lexer and parser (more advanced than yacc's LaLr(1), grammars in Extended Backus-Naur form.

A Language for MAcro processing, general purpose, powered by Ruby. Allows using any Ruby method in the same way one uses macros, so, immediately, Alma has thousands of built-in functions. [Open Source, GPL]

Genetic programming library in Ruby.

Provides a Rails plugin to offer declarative transaction management.

Small amounts of Ruby/Tk, SSI filter for HTML documents, initializer for multi-dimensional arrays, flock function checker, rot13, email counter/grapher.