In goes a hash, out comes hidden fields. Great for preserving Rails parameters without abusing the session.

Support for deprecating/rotating signed cookie secret tokens in rails. Handles silently accepting cookies signed with different secrets and sending back cookies signed with new secret.

Render Markdown via HTML::Pipeline in Rails.

Clean up your controller code by raising exceptions that generate responses with different HTTP status codes.

Use Jsonify for Rails View templates

JSON schema validation for Rails

Formatter for logging with ActiveSupport::TaggedLogging as JSON

Kaminari is a Scope & Engine based, clean, powerful, agnostic, customizable and sophisticated paginator for Rails 3+

Rails UI plugin for Killbill administration.

Kill Bill payment plugin for Paypal Express Checkout.

kube-rails project integrates Kube for Rails 4 Asset Pipeline

Ride the rails but don't touch them.

An ActiveSupport cache store that uses the C-based libmemcached client through Evan Weaver's Ruby/SWIG wrapper, memcached. libmemcached is fast, lightweight, and supports consistent hashing, non-blocking IO, and graceful server failover.

Generation next link_to-helper for Rails: Spiced with intelligence, and semantic beauty.

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.

Quick and easy mapping with MapPLZ

Adding checkbox rendering functionality on top of the redcarpet markdown parser

A gem that allows you register media types and unmarshal/marshal data accordingly

Undo for Rails/ActiveRecord - covers destroy, update and create

It is a very simple Rails plugin to help you customize your pages' meta tags a little bit easier.