Tools

About Ruby
Scripts and libraries, Pcap libpcap interface, Python embedded in Ruby, Ruby SWIG module. By Masaki Fukushima.
http://www.goto.info.waseda.ac.jp/~fukusima/ruby/index-e.html

AESCrypt
Program to encrypt/decrypt streams of data using Rijndael and Cipher Block Feedback mode (CFB-128), for shell scripts and Ruby. Description, downloads.
http://aescrypt.sourceforge.net/

Alma
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]
http://harpo.free.fr/alma/

Arachno Ruby
Commercial IDE, with integrated debugger, useful for normal and Web programming, applications. [Scriptolutions]
http://www.ruby-ide.com/ruby/ruby_ide_and_ruby_editor.php

AspectR
Module adds simple aspect-oriented programming concepts to Ruby; allows wrapping code around extant methods in classes, which separates different concerns into different parts of the code. [Open Source, GPL]
http://aspectr.sourceforge.net/

BioRuby
Ruby library; goal: implement integrated environment for bioinformatics research in Ruby. Kept simple to maximize usability, efficiency for biologists as a daily tool. Begun in Japan, supported by Universities of Tokyo, Kyoto; Open Bio Foundation.
http://bioruby.org/

Dectxn
Provides a Rails plugin to offer declarative transaction management.
http://dectxn.rubyforge.org

DRP: Directed Ruby Programming
Generative programming system, for genetic programming, grammatical evolution, or hybrid GP-GE; coded in all Ruby; best suited for interactive evolution and design work. Open source, GPL.
http://drp.rubyforge.org/

Erik Veenstra: Ruby
Projects (Tar2RubyScript, RubyScript2Exe, RubyWebDialogs, AllInOneRuby), well documented; tutorials (Distributing Ruby Applications, Distributing Rails Applications, Monitor-Functions), Code Snippets.
http://www.erikveen.dds.nl/ruby.html

FreeRIDE
Ruby Integrated Development Environment, IDE. Wiki format, descriptions, FAQ, documents, screenshots, development and subproject links. Linux, Unix, Windows. [Open Source]
http://freeride.rubyforge.org/wiki/wiki.pl

Gecode/R
Offers an interface to the constraint programming library Gecode.
http://gecoder.rubyforge.org

HighLine
High level library to deal with text user interfaces, build command line interfaces. Robust formatting has word wrap, paging, and list handling are possible. Handles validation rules for user input, implements menus easily. [Open source, GPL or Ruby License]
http://highline.rubyforge.org/

Hipster's
Dozens of Ruby programs. Examples: reverse dependency tool, simple HTTP daemon, vim syntax coloring, Design by Contract, Literate Ruby, Fibonacci generators, generic XML generator.
http://www.xs4all.nl/~hipster/

LoveRubyNet
Software Archive, many projects. Examples: Racc, LALR(1) Perser generator; TMail, Mail Class (implements MIME multipart, more); strscan, extension to scan string faster. English and Japanese versions. Ruby-dev summary index. By Minero Aoki.
http://www.loveruby.net/

Mocha
Library for mocking and stubbing using a syntax like with JMock and SchMock.
http://mocha.rubyforge.org

Motoyuki Kasahara's Page
Ruby tools: find2 replaces find.rb, getoptlong library to parse command line options. Other free software.
http://www.sra.co.jp/people/m-kasahr/

MySQL/Ruby
MySQL API module (extension library) for Ruby; gives same functions to Ruby programs that MySQL C API gives to C programs.
http://www.tmtm.org/en/mysql/ruby/

ncurses-ruby
Ruby module; makes most functions, constants, and external variables of the C ncurses library accessible from Ruby.
http://ncurses-ruby.berlios.de/

Numerical Ruby
Modules: NArray class for Numerical N-dimensional Arrays; Quanty (units) class containing value and unit, for automatic unit conversion and calculation; link to PGPlot graphics library interface.
http://narray.rubyforge.org/

Play Ground of Ruby
Small amounts of Ruby/Tk, SSI filter for HTML documents, initializer for multi-dimensional arrays, flock function checker, rot13, email counter/grapher.
http://members.at.infoseek.co.jp/shiroikumo/ruby/index-en.html

RDE: Ruby Development Environment
Integrated Development Environment, mostly a GUI wrapper of debug.rb with editor, Windows only. Screenshot, description, downloads: old, new.
http://homepage2.nifty.com/sakazuki/rde_en/

Rinn
CORBA for Ruby. Goal: a pure Ruby version based on CORBA-Ruby Mapping Specification.
http://sourceforge.net/projects/rinn/

Rockit
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.
http://rockit.sourceforge.net/

Ruby as Glue Language
Ruby bindings for several libraries, programs, with readme files.
http://www2s.biglobe.ne.jp/~Nori/ruby/

Ruby Binaries
Cygwin DLL; GTk+ on Win32 DLLs; bmingw; rb2exe, turns Ruby scripts to executable files, which need Ruby interpreter.
http://www.os.rim.or.jp/~eban/

Ruby In Steel IDE
Provides an IDE for Visual Studio with a commercial and a free personal edition.
http://www.sapphiresteel.com

RubyCocoa
Ruby/Objective-C bridge for Mac OS X with Cocoa; Cocoa bindings for Ruby. Allows native OS function mixins and GUI component use, write Cocoa programs in Ruby, mix Ruby and Objective-C code, create and use Cocoa objects in Ruby scripts. English, Nihongo. [Open Source]
http://rubycocoa.sourceforge.net/

Ruby/GP
Genetic programming library in Ruby.
http://www31.tok2.com/home/akimichi/aki/program/gp/

RubyInline
Analog to Perl's Inline::C, allows embedding C external module code in Ruby scripts directly; code is compiled and run on the fly, as needed. [open source, MIT License]
http://sourceforge.net/projects/rubyinline/

RubyUnit
Simple testing framework for Ruby. Descriptions, downloads.
http://homepage1.nifty.com/markey/ruby/rubyunit/index_e.html

RUDL Library
Interfaces the Simple Directmedia Library to Ruby, giving it high speed graphics, sound, and input abilities. Links to related projects. [Open source, LGPL]
http://rudl.sourceforge.net/

RuSTEM
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.
http://freshmeat.net/projects/rustem/

RZBD
Ruby Zebedee: 100% compatible clone (protocol, configuration file), can be used by Ruby scripts easily like standard Socket API. Zebedee is simple program to form encrypted, compressed tunnel for TCP/IP or UDP data between two systems.
http://www007.upp.so-net.ne.jp/kengai/zebedee/rzbd.html

Tesly Jr.
Logs results of automated unit tests, and displays results in HTML view. RSS feeds track every test run.
http://junior.tesly.com/

WxRuby
Ruby bindings to the wxWindows cross-platform toolkit; documents, references, Wiki, downloads. [Open source]
http://wxruby.rubyforge.org/wiki/wiki.pl

YAML.rb is YAML for Ruby
Full-featured YAML parser and emitter. Use as drop-in replacement for PStore, or use one of its several APIs to store object data in friendly and readable YAML style; write data structures in plain text.
http://yaml4r.sourceforge.net/doc/

Yoshidam's Secret Page: Ruby
Information on Ruby, powered by his XML module. Modules: XMLParser, Uconv, Oracle, VFlib3, Perl, Multibyte Extension for String class, Syslog; Libraries: Unicode, Susie Plugin, DirectDraw for Ruby, MDN.
http://www.yoshidam.net/Ruby.html