Use Keytar to automatically generate keys based on class name instead of cluttering model definitions with tons of redundant key method declarations.

Abuse Sql database as Key-Value store

Kill Bill payment plugin for Paypal Express Checkout.

Process KISSmetrics data dumps

Quickly add KMS encryption and decryption to your ActiveRecord model attributes and ActiveJob parameters. Improves upon kms_attrs with ActiveJob support, more efficient binary serialization and a test suite.

Compose an object from comma separated keys.

Process your Paperclip attachments in the background with ActiveJob

An extension for ActiveRecord models that adds a a very easy to use caching layer for models that include an updated at column.

This gem helps doing LEFT JOIN's between ActiveRecord associations

Backport `left_joins` from Rails 5 for Rails 3 and 4.

Create ActiveRecord models from an existing database

Ride the rails but don't touch them.

Store order of your models by using lexicographic sorting.

Bring the speed back to your Active Record models!

WIth this gem, you can render your Ruby on Rails views with liquid templates that are loaded from database. This way, the look and feel of your site can be safely configured by it's users.

LoggableActivity is a powerful gem for Ruby on Rails that provides seamless user activity logging prepared for GDPR compliance and supporting record relations. It allows you to effortlessly keep track of user actions within your application, capturing who did what and when, even with ...

LogicalModel allows to use a resource as a model. It is based on web presentation http://www.slideshare.net/ihower/serviceoriented-design-and-implement-with-rails3

A Rails library for logging login attempts and blocking as appropriate.

Another Logger - Addon for Database Support (LogDb, Log Model etc.)

"Bitfields for ActiveRecord": store low-cardinality columns in a separate table for vastly more flexibility and better performance.