Active Workbench gem generates ActiveRecord Model files from a MySQL Workbench .mwb file. ActiveRecord’s associations will be added to models by analyzing foreign keys in MySQL Workbench EER Model.

Work with local and remote worksheets like ActiveRecord/ActiveResource models.

Gem provides a number of methods to easily move through xmls

A nameserver-agnostic library to manage DNS zones with Active Model

Redis and database based activity stream in Rails 3 applications

An activity logger for rails 5 that provides view helpers to render basic format of activity.

Activity Provider for store data of education in LRS (Learning Record Store) based on xAPI specification https://github.com/adlnet/xAPI-Spec/blob/master/xAPI.md

Activity Streams system by Fotonauts.

Automatically synchronise actor information to your third party systems e.g. Mixpanel, Sendgrid, etc.

This gem is rails3.2 compatible version of Dmitriy Timokhin's plugin acts_as_20ggable: https://github.com/pager/acts_as_20ggable

Acts As Active is a tracker and activity generator for any ActiveRecord model, making it easy to generate statistics, streaks, and data visualization.

acts_as_api library adjusted to support sequel models

Treat array fields simply.

ActsAsAsync is an ActiveRecord extension that provides your models with easy-to-use Resque helpers.

acts_as_belongable is a Rubygem that provides an associations engine for Rails apps. It's primary use case is to simplify `has_many through: ...` relations.

A ruby gem for active record which simplify the copy of very complex tree data.

Make user chattable!

This acts_as extension modifies ActiveRecord classes so they can carry a reference to the instance defined as current for the given request. The library is particularly useful for providing the authenticated user object to models.

adds daterange to AR models

Rails 3 gem to treat an attribute as a decimal (getting and setting floating-point values) but storing it as an integer in the database (useful for prices and other precision-needed attributes like money).