This "acts_as" extension is a clone of the well known acts_as_list, only it avoids triggering active record callbacks.

Originally a Rails 2 plugin, this Gem ports that functionality to newer Rails versions.

Makes your Active Record models behave like content on Snapchat.

Acts as Soft Delete by Field: Provides soft deletion for ActiveRecord models using a field to flag the datetime of deletion

Create virtual attributes.

acts_as_starable is a gem that allows a model to act as a starer of other models or one that can be starred.

Add the ability to give star ratings to various models.

Given a list of datetime _at attributes allow an activerecord object to query status, change status and hold multiple states, these states can be used to build state machines or other constructs.

Rails injectable Redis-backed activity stream system. This is an alpha release of code that I just wrote and put into production on 3/11/12. Send feedback and post bugs to the Github page, but use at your own risk!

Easy way to define AR attributes that should be stripped before save

create a url-friendly stub based on an activerecord column for your models

acts_as_tableless

With ActsAsTaggableOnDynamic, you can tag a single model on several contexts based on the ActsAsTaggableOn gem. This gem extends rails forms support.

It adds support for Delayed Job.

Toggleable attributes for your ActiveRecord models.

Multiple tokens for Rails application.

Make ActiveRecord models easily searchable via tokens.

ActsAsTranslated is an acts_as for ActiveRecord that allows easy attribute translation.

A gem that adds simple support for organizing ActiveRecord models into parent–children relationships.

ActsAsTreeDiagram extends ActsAsTree to add simple function for draw tree diagram with html.