A bloomfilter implementation in both Ruby and Javascript that can be serialised to and loaded from JSON. Very useful when needing to train a bloom filter in one language and using it in the other.

The CloudFormation Framework

A simple LRU-cache based on a hash and priority queue

LtiProvider is a mountable engine for handling the LTI launch and exposing LTI parameters in your rails app.

Masquito is a DNS masquerading server for rubists and their applications

MediaMagick aims to make dealing with multimedia resources a very easy task – like magic.

Finds all the missing i18n translations in your Rails project

Mohawk is a page-object style driver that makes it easy to automate windows applications. It allows you to create a very flexible, clean and natural DSL around whatever windows application that you are trying to automate using the RAutomation gem as the underlying driver.

Simple data preparation from Mongoid to the jQuery DataTables plugin

This gem contains a script to start a Unicorn-based server for your Rack application that reloads your automatically when they are changed, but doesn't incur the penalty of reloading all the gem dependencies. It's based on Jonathan D. Stott's blog post "Magical Reloading Sparkles"--hence the name.

Oembed Provider Rails 3 Engine

Rake tasks for compiling C projects.

Pavlov is a opinionated toolbox to help you architect your Ruby project.

Parse Photoshop PSD files with ease

Qiwi payments solution

QueenCheck is random test library. Inspired by QuickCheck library in Haskell.

Rails-bigint-pk modifies Rails so that it uses 64-bit primary and foreign keys. It works with MySQL and PostgreSQL and has versions for Rails 3 and 4.

A Ruby gem for the Riot Games API

Rspec matcher for ensuring XML validates against a given XSD

A Ruby client library for the FreeSWITCH EventSocket API built on Celluloid.