OptparsePlus provides a lot of small but useful features for developing a command-line app, including an opinionated bootstrapping process, some helpful integration test support, and some classes to bridge logging and output into a simple, unified, interface

Awestruct is a static site baking and publishing tool. It supports an extensive list of both templating and markup languages via Tilt (Haml, Slim, AsciiDoc, Markdown, Sass via Compass, etc), provides mobile-first layout and styling via Bootstrap or Foundation, offers a variety of deployment optio...

Bootstrap

PageDown Bootstrap for the Rails asset pipeline

Easily generate a Bootstrap navbar in your Rails app

Bootstraps in code required to take advantage of EventMachine/EM-Synchrony's concurrency enhancements for slow IO. Patches TCPSocket, which makes anything based on it EM-aware (including RestClient). Includes patch for tests. Requires Fibers (Ruby 1.9, JRuby and Rubinius in 1.9 mode)

This gem provides Twitter Bootstrap converted to Sass directly for you Rails 3 application.

Twitter Bootstrap CSS toolkit for Rails 3 projects

Wrapping the assets of Lightbox for Bootstrap 4 as a ruby gem.

Bootstrap icons library for Phlex

A Rails plugin that contains helpers for Bootstrap

A gem for adding the tokenizing plugin, Bootstrap Tokenfield to the rails asset pipeline

A bootstrap based theme for Hobo

simple_navigation_renderers gem adds renderers for Bootstrap 2 and 3. With these renderers you will be able create any bootstrap navigation elements, such as: submenu, navbar-text, divider, header. As well as add icons to menu elements, such as: gliphicons, font-awesome icons, even custom icons. ...

Everything you need to get set up with bootstrap 4.

google-bootstrap in sass for rails

Translate your apps with pleasure (sort of...) and for free. It's simple i18n web interface, build on top of twitter bootstrap, that one may find helpful in translating app by non-technicals.

Additional UI tags for the hobo_bootstrap theme

A plugin to add Twitter Bootstrap to your Jekyll site

Helper methods for Rails to aid in creating Twitter Bootstrap Components