High method and class churn has been shown to have increased bug and error rates. This gem helps you know what is changing a lot so you can do additional testing, code review, or refactoring to try to tame the volatile code.

This gem provides CodeMirror assets for your Rails application.

A ruby gem for validating credit card numbers

Until there is a Kindle API, this will suffice.

Simple Rails & AWS Lambda Integration using Rack and various utilities.

A gem that calculates the exchange rate using published rates from open-exchange-rates. Compatible with the money gem.

A collection of extensions for packwerk packages.

Ruby Stats is a port of the statistics libraries from PHPMath. Probability distributions include binomial, beta, and normal distributions with PDF, CDF and inverse CDF as well as Fisher's Exact Test.

SSRF Proxy is a multi-threaded HTTP proxy server designed to tunnel client HTTP traffic through HTTP servers vulnerable to HTTP Server-Side Request Forgery (SSRF).

Distributed locks (mutexes & semaphores) using Memcached or Redis.

ThumbsUp provides dead-simple voting capabilities to ActiveRecord models with karma calculation, a la stackoverflow.com.

This gem identifies valid tracking numbers and the service they're associated with. It can also tell you a little bit about the package purely from the number—there's quite a bit of info tucked away into those numbers, it turns out.

Websocket interface on Rack Hijack w/ Rails support

A scalable XMPP chat server.

Simple WebSocket Client for Ruby

APIFuzzer gem builds api for finding security issues through a fuzzer

A Ruby gem. For emoji. For everyone. :heart:

Define methods for accessing translated attributes

Put your html on a diet

Documentation measurement tool for Ruby, based on YARD.