Prefab provides Twitter Bootstrap generators for Rails 5 (supported Rails >= 5.0.1). Checkout http://getbootstrap.com.

Simple, standard and elegant CSS structures based on Bootstrap3

rails helpers for bootstrap 3

A tool for bootstrapping new Aptible projects

rails helpers for bootstrap 3

A bootstrap 3 form builder

Rails Exception Handler Admin interface built on rails scaffolding with a twitter bootstrap theme.

Nuptials a Wedding Category Flat Bootstrap Responsive Web Template

Navigations for Jekyll-based sites. Twitter Bootstrap compatible.

Website bootstrap style generator for your JAXRS REST API doc

Tom hacked to hell, bootstrapped and ready to rock.Inverted theme available too.

Jekyll Bootstrap Theme

Bootstrap HYFN Projects

Basic CSS framework for IASD DSA websites

Rails model viewer using reflection and Bootstrap

Provisions and bootstraps nodes using knife

Bootstraps a pretty looking Rails app in a jiff.

An extension of simple_form, add layout function and add input controls based on bootstraps.

Interview is a easy and simple frontend for Rails based on Ruby Objects and Bootstrap.

Blog engine based on Jekyll Bootstrap