Organizes ActiveRecord models into a tree/hierarchy using a materialized path implementation based around PostgreSQL's ltree datatype. ltree's operators ensure that queries are fast and easily understood.

A gem with tools for machine learning.

Machinery is a systems management toolkit for Linux. It supports configuration discovery, system validation, and service migration. It's based on the idea of a universal system description.

A MediaElement gem(engine) for Rails. Makes embedding HTML5 video easy.

MediaInfo is a class wrapping the mediainfo CLI (http://mediainfo.sourceforge.net) that standardizes attributes/methods and also converts most values into something Ruby can understand.

Mere is a minimal and simple blog theme, and nothing more, for use with Jekyll and GitHub Pages.

A Ruby gem for interacting with the Salesforce Metadata API

Python's function decorators for Ruby

Small images are small! Compress yours during middleman build.

Milkode is line based local source code search engine. It have command line interface and web application. It will accelerate the code reading of your life.

Minipack is a gem for minimalists that integrates Rails and webpack without Webpcker

Alternative for setup/teardown dance.

Metadata (key-value) support for minitest/spec

Hanna is an RDoc implemented in Haml, making its source clean and maintainable. It's built with simplicity, beauty and ease of browsing in mind.

ActiveModel + Redis

brings some functional goodness to ruby by giving you some monads

A library for storing encrypted data in Mongo

Rails session stores for Mongoid, or any other ODM. Rails 4 compatible.

RuboCop has many breaking changes between releases. This tool migrates your RuboCop config, making updating RuboCop easier.

This library is a wrapper for the ExifTool command-line application (https://exiftool.org) written by Phil Harvey. It is designed for dealing with multiple files at once by creating commands to call exiftool with various arguments, call it and parsing the results.