Extract, Transform, and Load (ETL) ruby wrapper

Add schema comments in your migrations, see them in model annotations and db/schema.rb dump

Provides enhancements to ActiveRecord to handle spatial datatypes in PostgreSQL and MySQL.

Download, pull out of a ZIP/TAR/GZ/BZ2 archive, parse, correct, and import XLS, ODS, XML, CSV, HTML, etc. into your ActiveRecord models. Uses Upsert internally for speed.

Enables your monitoring infrastructure to easily query the status of your app server's health. Provides routes under /up.

Fast fuzzy string matching for rails

A phishing kit collector for scavengers

Enable enum type for the MySQL Adapter in ActiveRecord

Use production statistics for realistic SQL query analysis. Finds code that may take down production, including missing indexes, overly broad indexes, and queries that return too much data.

ActiveRecord sharding extension

Job queue system to run job with Docker

Ferry is a data migration and visualization command line tool rubygem that seeks to simplify the increasingly prevalent big data problems for developers

hydra_attribute is an implementation of EAV pattern for ActiveRecord models.

Adds the ability to pull random records from ActiveRecord

Record Cache for Rails 3

This gem makes Rails console sessions less dangerous in specified environments by warning, color-coding, auto-sandboxing, and allowing read-only external connections (disables job queueing, non-GET requests, etc.)

MySQL adapter for thoughtbot/scenic

Awesome patches backported for ActiveRecord MySQL adapters

It is the library to reconnect automatically when ActiveRecord is disconnected from MySQL.

With Amountable, you can easily attach, organize and sum Ruby money fields to your models without migrating.