inuit.css is a powerful little framework designed for serious developers (http://inuitcss.com/). This gem allows for its easy inclusion into the rails asset pipeline.

SlickGrid (6pac fork) gem for Rails

Rails 3.x integration of SlickGrid with Bootstrap

SlickGrid Integration for Rails and RequireJS

slick-lightbox, a lightbox wrapper for Ken's amazing slick carosel, packaged as a gem for simple use within Rails applications

Make sidebar menus using SIDR for Rails 4.

Slidesjs assets for Rails 3.1

a simple lightbox plugin for Rails Asset Pipeline.

Gemify Slimbox2 to use with Rails 3.1 asset pipeline

Packages Slim Select for easy use with Rails

A Rails slug generator inspired by friendly_id

Seamlessly use environment variables with automatic fallback to Rails credentials, supporting nested values and flexible configuration

Manage Smartfocus campaigns and messages from your rails application

Log events from your app to Smartlist so you can create customer segments and campaigns.

Send emails using Sparkpost API

smart-spinner-cis will provide spinner(ajax-loader) on page load

Smithy is a code generation toolkit for creating Client and Server SDKs from Smithy models.

smklib is somekool's ruby library...

A jquery plugin

A Rails engine for quickly adding SMS authentication to a Rails API