ActiveVersion is a language-agnostic versioning library that unifies three core use cases: translations (locale-based), revisions/drafts (workflow snapshots), and audits (change tracking).

ActiveVlc provides a convenient DSL to build VLC transcoding and/or streaming pipelines

ActiveWarehouse extends Rails to provide functionality specific for building data warehouses.

ActiveSupport based Object Oriented API represents week

Expressive, chainable DSL for SQL window functions (ROW_NUMBER, RANK, LAG, LEAD, SUM, etc.) that integrates naturally with ActiveRecord query methods.

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.