You don't have to wait until Ruby 2.0 to get (named|keyword) arguments support. Arguments has been tested with Ruby 1.8.6 and ruby 1.9.1 and eventually will work with JRuby (if someone is interested in contributing, I guess is possible since merb-action-args works with JRuby)

fast execution of ruby code

Complex format validators

Convert Haml templates to Slim templates.

Automates as much as possible in assistance with porting of gems to RubyMotion

Quality of Life tools for managing inspec profiles.

Provides a command and API to detect magic numbers in ruby code

Moby makes DCI a DSL for Ruby it's mainly based on the work gone into Marvin, the first language to support injectionless DCI. The performance of code written using Moby is on par with code using regular method invocation. For examples on how to use Moby look at the examples

LiveAST enables a program to find the ASTs of objects created by dynamically generated code.

Ruby partial interpreter written in pure-ruby

Full-automated dynamic vulnerability scanning tool for Ruby on Rails project!

Provides some automation to attempt to convert your Ruby Test::Unit tests into RSpec.

ruby_parser-legacy includes the ruby 1.8 and 1.9 parsers from ruby_parser (now removed) and plugs them into the existing system.

A ruby hacker's search tool. Quickly interrogate your code, seek out classes, methods, variable assignments, and more.

Provides a series of s-expression transformations useful for automatic refactoring or morphing of Ruby/Rails/Sinatra code.

tests strings of Ruby code for unauthorized patterns (exit, eval, ...)

Parses a hash string of the format `'{ :a => "something" }'` into an actual ruby hash object `{ a: "something" }`. This is useful when you by mistake serialize hashes and save it in database column or a text file and you want to convert them back to hashes without the security issues of executing `eval(hash_string)`. By default only following classes are allowed to be deserialized: * TrueClass * FalseClass * NilClass * Numeric * String * Array * Hash A HashParser::BadHash exception is thrown if unserializable values are present.

Simple multi-agent framework. It uses AMQP for it's messaging layer.

Clean up your controller, slim up your models, handle more use cases

A tool for automatic extraction and verification of Rails formal models. Just include it in your Gemfile, write a few invariants, setup Spass and `rake verify`!