ActionController::Renderer allows you to render arbitrary templates without requirement of being in controller actions.

Slow content got you down? Load it later! Use this gem to defer loading of portions of your page until after load. They will be fetched via AJAX and placed on the page when ready.

Give early warning to users of form errors before they submit. With client side validations, the user can correct any errors prior to submitting the form.

Infinite scrolling is now a common feature and there are several cases where it is really useful. For instance there are some websites where we simply can’t imagine a good pagination system, like Twitter or even Facebook.

Compose beautifully formatted text in your web application. Trix is a WYSIWYG editor for writing messages, comments, articles, and lists.