Liquid is a template language written in Ruby. It is used to load dynamic content on storefronts.

This gem provides a DSL that makes it easy to write reports of various types in ruby. It eliminates the need to litter your source with puts statements, instead providing a more readable, expressive interface to your application.

Faraday is a HTTP/REST API client library which provides a common interface over different adapters.

Pry Doc is a Pry REPL plugin. It provides extended documentation support for the REPL by means of improving the show-doc and show-source commands. With help of the plugin the commands are be able to display the source code and the docs of Ruby methods and classes implemented in C.

Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses, it unifies the API for web servers, web frameworks, and software in between into a single method call.

Pry is an IRB alternative and runtime developer console for Ruby. It features syntax highlighting, a plugin architecture, runtime invocation, and source and documentation browsing.

ExecJS lets you run JavaScript code from Ruby. It automatically picks a runtime to evaluate your JavaScript program, then returns the result to you as a Ruby object.

This package provides a library to help create value objects without the pain of Ruby's Struct (or its setters).

This package provides unicode normalization form support for Ruby.

Net::SCP is a pure-Ruby implementation of the SCP client protocol.

This package provides a implementations of custom cops that are bundled as defaults in Standard Ruby.

queue_classic is a queuing library for Ruby applications (Rails, Sinatra, etc.) queue_classic features asynchronous job polling, database maintained locks and has a single dependency, pg.

Parallel allows you to run any code in parallel Processes (to use all CPUs) or Threads(to speedup blocking operations). It is best suited for map-reduce or e.g. parallel downloads/uploads.

minitest-rg changes the colour of the output from Minitest.

RubyMoney provides a library for dealing with money and currency conversion. Its features are:

• Provides a Money class which encapsulates all information about a certain amount of money, such as its value and its currency.

• Provides a Money::Currency class which encapsulates all information about a monetary unit.

• Represents monetary values as integers, in cents; so avoids floating point rounding errors.

• Represents currency as Money::Currency instances providing a high level of flexibility.

• Provides APIs for exchanging money from one currency to another.

Mercenary is a lightweight and flexible library for writing command-line apps in Ruby.

Bio-logger is a wrapper around Log4r adding extra logging features such as filtering and fine grained logging.

KPeg is a simple PEG library for Ruby. It provides an API as well as native grammar to build the grammar. KPeg supports direct left recursion of rules via the OMeta memoization technique.

WebMock allows stubbing HTTP requests and setting expectations on HTTP requests. This is useful when testing software.

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.).

Knows about MRI, Rubinius, JRuby, MagLev and MacRuby.

This gem removes common margin from indented strings, such as the ones produced by indented heredocs. In other words, it strips out leading whitespace chars at the beginning of each line, but only as much as the line with the smallest margin.

It is acknowledged that many strings defined by heredocs are just code and fact is that most parsers are insensitive to indentation. If, however, the strings are to be used otherwise, be it for printing or testing, the extra indentation will probably be an issue and hence this gem.

m stands for metal, a better test/unit and minitest test runner that can run tests by line number.

Gherkin-ruby is a Gherkin parser written in pure Ruby and less than 200 lines of code.