ActiveRecord-ish OpenObject Wrapper

Kannuki provides database-agnostic advisory locking for ActiveRecord with support for PostgreSQL and MySQL, offering blocking/non-blocking strategies, instrumentation, and ActiveJob integration.

Kant is a tiny authorization library for your Ruby (especially Rails and/or ActiveRecord) projects.

A captcha verification approach for Rails apps, directly integrated into ActiveRecord’s validation mechanism and providing helpers for ActionController and ActionView.

Searching form and sorting query builder

Kashmir helps you easily define decorators/representers/presenters for ruby objects. Optionally, Kashmir will also cache these views for faster lookups.

A toolkit for building form objects.

Rich content page builder and editor

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

Provides single sign-on authentication for web applications using the CAS protocol.

Adds WSDL/SOAP and XML-RPC web service support to Action Pack

Add simple versioning to ActiveRecord models.

Prevent ActiveRecord attributes for not null columns with default values from being set to nil. Instead of setting/returning nil the column's default value is returned.

One-stop destination for defining you actionswhen specific Rails instrumentations occur

A comment viewer for http://live.nicovideo.jp/

Add drafts to ActiveRecord models.

Adds WSDL/SOAP and XML-RPC web service support to Action Pack

KeyCache ties in to ActiveRecord callbacks and enables you to store info in redis

Manage application level keypairs with automatic rotation and JWT support

Filter sensitive keyword method.