Adds auditing capabilities to ActiveRecord associations, in a similar fashion to acts_as_audited.

Define user capabilities in your app

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

Change an ActiveRecord string column into a byte field.

Allows any model to be categorized.

acts_as_category

gem that provides comment functionality.

Rails gem that provides comment functionality with one-level nesting of comment replies (based on acts_as_commentable)

This gem provides basic linking functionality of active record objects. In cases when hard-coded references are not needed, you may refer to other objects by adding them to context

acts_as_crazy makes your objects do crazy things at random moments

Extends default CSV behavior to ActiveRecord models

This "acts_as" extension provides the capabilities a application to allow to generate meaning ful urls for SEO perpose.

Adds methods to models and controllers to perform automatic filtering, sorting and multi-column-queries without having to worry about the implementation.

adds daterange to AR models

Using acts as default you can set a default row in your activerecord collection, also for has_many relationships

This gem sets the digested value before validation and validates uniqueness of the digested value.

Another paranoid gem

Easy way to define AR attributes that should be stored in lowercase

create methods dynamicly from json string

Editions for ActiveRecord models