Web apps on Rails. Simple, battle-tested conventions for building and testing MVC web applications. Works with any Rack-compatible server.

Nokogiri (鋸) makes it easy and painless to work with XML and HTML from Ruby. It provides a sensible, easy-to-understand API for reading, writing, modifying, and querying documents. It is fast and standards-compliant by relying on native parsers like libxml2, libgumbo, or xerces.

A Ruby parser written in pure Ruby.

Brakeman detects security vulnerabilities in Ruby on Rails applications via static analysis.

ruby_parser (RP) is a ruby parser written in pure ruby (utilizing racc--which does by default use a C extension). It outputs s-expressions which can be manipulated and converted back to ruby via the ruby2ruby gem. As an example: def conditional1 arg1 return 1 if arg1 == 0 return 0 end becomes: s(:defn, :conditional1, s(:args, :arg1), s(:if, s(:call, s(:lvar, :arg1), :==, s(:lit, 0)), s(:return, s(:lit, 1)), nil), s(:return, s(:lit, 0))) Tested against 801,039 files from the latest of all rubygems (as of 2013-05): * 1.8 parser is at 99.9739% accuracy, 3.651 sigma * 1.9 parser is at 99.9940% accuracy, 4.013 sigma * 2.0 parser is at 99.9939% accuracy, 4.008 sigma * 2.6 parser is at 99.9972% accuracy, 4.191 sigma * 3.0 parser has a 100% parse rate. * Tested against 2,672,412 unique ruby files across 167k gems. * As do all the others now, basically.

Gettext is a GNU gettext-like program for Ruby. The catalog file(po-file) is same format with GNU gettext. So you can use GNU gettext tools for maintaining.

Unobtrusive nested forms handling, using jQuery. Use this and discover cocoon-heaven.

Ruby implementation of http://goessner.net/articles/JsonPath/.

A Toml parser using Citrus parsing library.

Journey is a router. It routes requests.

A stackable dynamic tree based Rack router.

This library helps write robots.txt compliant web robots in Ruby.

BCDice is a rolling dice engine for TRPG

Ruby compiler and runtime for the google protocol buffers library.

Namae (名前) is a parser for human names. It recognizes personal names of various cultural backgrounds and tries to split them into their component parts (e.g., given and family names, honorifics etc.).

Collection of utilities which submit events to Riemann,

A Ruby-like language for writing Ruby C extensions. Rubex keeps you happy even when writing C extensions.

A higher level query language for PuppetDB.

BibTeX-Ruby is the Rubyist's swiss-army-knife for all things BibTeX. It includes a parser for all common BibTeX objects (@string, @preamble, @comment and regular entries) and a sophisticated name parser that tokenizes correctly formatted names; BibTeX-Ruby recognizes BibTeX string replacements, joins values containing multiple strings or variables, supports cross-references, and decodes common LaTeX formatting instructions to unicode; if you are in a hurry, it also allows for easy export/conversion to formats such as YAML, JSON, CSL, and XML (BibTeXML).

Querly is a query language and tool to find out method calls from Ruby programs. Define rules to check your program with patterns to find out *bad* pieces. Querly finds out matching pieces from your program.