Jinrai is a awesome Cursor based pagination Link.

Provides the `jqGrid` jQuery plugin packaged for the Rails 3.1+ asset pipeline.

Why make the browser load images that the user isn't going to see? This Rails engine prevents images from loading until they're actually going to be displayed. This saves bandwidth, reduces server load, and helps the user stay under their data quota.

Namespace and Selectively Execute Javascript

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

JSON schema validation for Rails

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

Kelp is a collection of helper methods for Cucumber to ease the process of writing step definitions. It also includes a Rails generator for generic step definitions building upon those helpers.

Shareable tools/components for building a digital collections app in Rails.

Knowledge Base is a bunch of models for Ruby on Rails that you probably need to build your own

Koalagator is an open source community calendaring platform

Metadata aggregation and enrichment for cultural heritage institutions.

Kuhsaft is a Rails engine that offers a simple CMS.

It delays loading of partial or actions in views.

Implements common components and features for Rails-based LCMS systems

LHC is an extended/advanced HTTP client. Implementing basic http-communication enhancements like interceptors, exception handling, format handling, accessing response data, configuring endpoints and placeholders and fully compatible, RFC-compliant URL-template support.

Auto-loads and authorizes resources in your controllers in Rails 4 and up.

LocomotiveSearch is an engine which integrates ActiveSearch into LocomotiveCMS.

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

Easily add Mailgun Webhook integration to your Rails or Rack application.