The finance library provides a Ruby interface for working with interest rates, mortgage amortization, and cashflows (NPV, IRR, etc.).

This gem helps create large (>50) gmail filter chains by writing xml compatible with gmail's "import/export filters" feature.

RSpec and Minitest matchers to prevent N+1 queries problem. Evaluates code under consideration several times with different scale factors to make sure that the number of DB queries behaves as expected (i.e. O(1) instead of O(N)).

Proxies can even proxy other proxies

RuboCop for git diff.

2 methods are provided for now - (1) naive bayes implementation + (2) tf-idf weights

Microsoft Azure Storage File Client Library for Ruby

Microsoft Azure Storage Queue Client Library for Ruby

Ruby port of EventEmitter from Node.js

A collection of libraries for working with SQL on top of ActiveRecord's connection.

This library allows you to recognize and build URLs in a Rack application.

manage jar dependencies for gems and keep track which jar was already loaded using maven artifact coordinates. it warns on version conflicts and loads only ONE jar assuming the first one is compatible to the second one otherwise your project needs to lock down the right version by providing a Jar...

Rack compatible HTTP router for Ruby

A Redis backend store for Rack::Cache

Automatically load and include all common Reform features for a standard Rails environment.

Rice is a C++ interface to Ruby's C API. It provides a type-safe and exception-safe interface in order to make embedding Ruby and writing Ruby extensions with C++ easier.

Pinyin is a romanization system (phonemic notation) of Chinese characters, this gem helps you to convert Chinese characters into pinyin form.

Websocket interface on Rack Hijack w/ Rails support

Program in YAML — Code is Data

Testing utils for Action Cable