Rack::AllowedHosts allows you to whitelist the hostnames allowed to serve the site. This is helpful to protect against Host Header Injection. See: https://acunetix.com/vulnerabilities/web/host-header-attack

A Ruby client library for Rafka, with consumer and producer implementations.

rails-jquery-tokeninput project integrates Tokeninput jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item

Get rates and tracking info from various shipping carriers. A fork of Shopify's original ActiveShipping gem.

rails chrono reactor

This module provides classes of redis sorted set to implement fast ranking, search, filtering with coherent cache management policy.

Redis Counters

Dump statistics from Redis to DB

An easy, distributed rate limiter using Redis

master-slave replication helper for ActiveRecord

Access control for single resource and it's methods

Seamless integration of resque with resque-progress and resque-lock

Riot games api wrapper for ruby

Event driven architecture library for AWS SNS/SQS include SQS worker and SNS publisher

Provides several useful patterns, such as Enumerated, Command, Enquiry, Query, QueryFilter, Service and Presenter, packaged in a gem, for use in Rails and other Ruby applications.

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Scaffolding for building services

Feature Management ROX Ruby SDK

Helpful matchers for comparing JSON documents.

RuboCop plugin for ruby reference implementation of ISUCON