Works "automagically" like updated_at...just add a column named <column>_updated_at, and when your column changes, the timestamp will be updated.

CommaHeaven permits easy exports of Rails models to CSV

Another ruby units library for doing dimensional math, this one to be used with rails, preferrably commerce-related apps

Commit-comment-tools is the tools for [commit-comment-service](http://www.clear-code.com/services/commit-comment.html).

Data push/pull between apps with local inbound/outbound queue and easy publish/process interface

Tenant composable object to scope ActiveRecord queries

Compose an IPAddr from an underlying 4-byte integer

Composition for ActiveRecord models

ActiveRecord extension for providing computed fields.

Define a pipeline of tasks, run them concurrently, and see a versioned history of all changes along the way.

Simple Ruby client for ConfigHub

Simple gem to assist with persisting configuration data.

A Rails gem that overrides ActiveRecord's destroy_all method to ask for confirmation before deleting records.

Adds functionality confirmable attributes to models.

A library for creating form objects for Rails applications.

Improves support for cross-schema, replication and mutli-DMS applications using ActiveRecord.

Register connpass's event in gmail

Provides ActiveRecord models with draft instances, including associations

A software model in Ruby for the greenhouse gas emissions of a consignment

Run custom consistency checks against your DB and track the results.