Manacle will allow you to attach constraints to your objects that will persist across new instances of similar objects. As an example, you can constrain a Time object to always advance to the next hour. Then, if you add even one minute to that Time, it will snap to the next hour.

API to interact with Mango https://getmango.com/

A library to allow photo manipulation on S3 images using RMagick

Lightweight string mappings engine for Rails

Large scale distribution and deployment of virtual disks using BitTorrent, Capistrano and Libvirt

DSL for creating complex Ruby hashes and arrays

Provides a command line tool for creating playlists that work with mplayer.

Implements asychronous, distributed state broadcasting for ActiveModel-like objects.

Mario is a collection of utilities for dealing with platform specific issues.

simple markov chains

MailChimp integration with Catarse crowdfunding platform

Marso is the beginning of a small lightweight BDD project. Currently, this is just a very simple code sample that only displays a custom message in green or in red depending on the value of a predicate.

Client to download and process the Maseti dataset. justice.gov.za/master/maseti/maseti.html

This gem allows you to pass multiple roles into methods like save and update_attributes

Mass shootings as a service

Adds Test::Unit assertions for RSpec and Shoulda matchers

A simple framework for communicating with 37signals' Campfire API. Currently still a work in progress.

Persist serialization in the model.

A podcast aggregator without an interface

A console to create, edit and maintain YAML files in any kind of Ruby projects