job_boss allows you to queue jobs which are unqueued by a "Job Boss" daemon and handed off to workers to process

Easily build jsonapi.org-compatible APIs

Add native support for MySQL [5.7] JSON data type to Rails 4.

ActiveRecord support for mapping complex documents in a single RDBMS row via JSON serialization.

Create flexible builders to export your queries easier than ever

Color search for Rails

Upstream pull request: https://github.com/amatsuda/kaminari/pull/636

puts a cap on your queries

An Active Record DSL extension that allows you to declare multiple associaitons with a block

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.

Queue any method in any class or instance with no need for additional Worker class and no extra code

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.

write common active_record methods in shorthand

This gem helps doing LEFT JOIN's between ActiveRecord associations