Mudis is a fast, thread-safe, in-memory, sharded LRU cache for Ruby applications. Inspired by Redis, it provides value serialization, optional compression, per-key expiry, and metric tracking in a lightweight, dependency-free package.

Command line utilities for inspecting and debugging Mudis caches, with optional Mudis-QL support.

Rails plugin for Mudis with an installer, generator, and cache store wrapper.

Amazon Selling Partner API client

multi-armed bandit algorithms

multi authentication gem using devise & co

Client for Multichain

Easily switch between email APIs

MultipleMan syncs changes to ActiveRecord models via AMQP

MultiRepo is a library for managing multiple repositiories and running scripts against them.

A fast multiple string replace library for ruby. Uses a C implementation of the Aho–Corasick Algorithm

MundoPepino is a set of reusable step definitions to test Rails apps with Cucumber

A JSON API Spec client for Ruby

musicbrainz_automatcher matches artists/tracks names to MusicBrainz intelligently

Simple Ruby wrapper for MusicBrainz XML Web Service

I wrote this quick library for aggregating analytics for my band, Operation ID. I wanted to track Last.fm, Twitter, and Myspace interactions over time. You might want to do this too!

Mustache support for Sinatra applications

Muster is a gem that turns query strings of varying formats into data structures suitable for easier consumption in AR/DataMapper scopes and queries.

DB constraints in migrations similiar to ActiveRecord validations. Core classes

Postgresql constraints in migrations similiar to ActiveRecord validations