A rails plugin use redis to sort models on real time.

use the type of integer in the STI(Single Table Inheritance)

Sanitizable concern to sanitize attributes the way you like

SCD models have identities and multiple time-limited iterations (revisions) per identity

Description of ActsAsScope.

On-the-fly RSA encryption for secure transmission of forms/resources over non-secure connection

Description of ActsAsSeoFriendly.

This ActiveRecord extension provides the capability to define or map attributes in your ActiveRecord models that can be easily represented with the necessary Open Graph, Twitter Cards or any other custom meta tags.

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

Makes your Active Record models behave like content on Snapchat.

Allows the RRN to perform garbage collection on categories that are no longer referenced.

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.

Rails StatusBar with ActiveRecord integration, permits dynamic custom output from your model

acts_as_statused was developed by: markbates

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!

With ActsAsSubscription, you can hook your model into several subscription services, such as CheddarGetter.

acts_as_tableless

Rails 3 plugin that is based on acts_as_taggable_on_steroids by jviney that is based on acts_as_taggable by DHH.