With ActsAsExpirable, you can mark ActiveRecord records as expired and programmatically find expired record.

Adds GitHub-like search function to your models

ActiveRecord Helper for Extjs

Add favorite feature to any Active Record models

Designates an attribute on this model to indicate "featuredness," where only one record within a given scope may be featured at a time.

Filter attributes and stuff.

This "acts_as" extension provides the capabilities for beautiful record finding by specified column(s).

act_as_flashcard is an adaptation of the Anki space repetition algorithm for rails applications

acts_as_flexigrid is ActiveRecord plugin for Flexigrid

Rails gem to allowing records to leave footprints

Rails gem to allowing models to be events for full calendar

Extends Active Record to add simple function for draw the Force Directed Graph with html.

acts_as_gravatar provide simple access to gravatar from ActiveRecord.Can interoperate with devise, etc..

This "acts_as" extension provides the capabilities for selecting default model according to scope.

ActsAsHashed is helpful to set a hash_code column based on SecureRandom.hex(16).

acts_as_has_many is a gem that makes it easy to work with JSONB arrays as Active Record associations in your Ruby on Rails applications. It simplifies nested form handling.

Rails plugin to handle first_name, middle_names and last_name combinations.

Use this gem to add import/export to .csv functionality to your activerecord models

Rendering business objects in ISDOC format

A simple plugin that automatically generates a key for a model on create. It takes care of protecting the key, automatically generating it and making sure it is unique.