Cauldron generates a methd from a number of examples that describe the input and the expected output. It is still at a very early stage of development right now so you're unlikely to get much practical use out of it.

never use alias_method_chain, again

Generate Ruby AST in Cirru grammar

No description for now, maybe later

CouchObject is a library that maps ruby objects to CouchDb documents

Ruby2CExtension is a Ruby to C extension translator/compiler/concretizer.

Convert Cucumber features to RSpec

cute_print writes debug output to stderr. Optionally prints the source filename and line number, or the source of the debug statement. Easily inspect the middle of a call chain.

Macros for ruby

ruby method describer to make it possible to inspect methods [rdoc, signature, etc.] at runtime, for example while debugging.

DataMapper plugin providing an Ambition-like API

Doppelganger helps you to find areas of your code that are good places to refactor. It does this by finding methods and blocks that are duplicates or have less then a set threshold level of difference or be less then a specified percent different. This library can either be used with in another larger code metric/heuristic library, or called from the command line.

A library for running tests across multiple applications from a single test case.

Programmēšanas valoda Dzintars

Ionize parses and translates Php scripts into Ruby code, which can be run from it's Rack based webserver

Esoteric langage compilers and virtual machines

Filipinomemes Programming Language

A toolkit for creating whitespace active mini-languages. Inspired by Haml, light on features.

This adds a task to Rails Applications to generate documentation for Grape APIs.

Hash Formatter is a library that formats Ruby hashes for code editors.