Sprockets is a Rack-based asset packaging system that concatenates and serves JavaScript, CoffeeScript, CSS, Sass, and SCSS.

bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.

Provides a better error page for Rails and other Rack apps. Includes source code inspection, a live REPL and local/instance variable inspection for all stack frames.

Integrate SassC-Ruby into Rails.

Profiling toolkit for Rack applications with Rails integration. Client Side profiling, DB profiling and Server profiling.

Soulful docs for Swift & Objective-C. Run in your SPM or Xcode project's root directory for instant HTML docs.

A framework for pulling together an overview of data that is important to your team and displaying it easily on TVs around the office. You write a bit of ruby code to gather data from some services and let Smashing handle the rest - displaying that data in a wonderfully simple layout. Built for developers and hackers, Smashing is highly customizable while maintaining humble roots that make it approachable to beginners.

Font-Awesome SASS gem for use in Ruby projects

Routing tree web toolkit

jQuery File Upload by Sebastian Tschan integrated for Rails 3.1+ Asset Pipeline

Set of addons to help with the activeadmin ui

Semantic UI, converted to Sass and ready to drop into Rails, Compass, or Sprockets.

A drop-in Jekyll Plugin that provides an asset pipeline for JavaScript, CSS, SASS, SCSS. Based around Sprockets (from Rails) and just as powereful it provides everything you need to manage assets in Jekyll.

Tolk is a web interface for doing i18n translations packaged as an engine for Rails applications.

Automatically generate beautiful front-end style guides with Sass and Markdown. See https://livingstyleguide.org for details.

Red Hat's Patternfly, converted to Sass and ready to drop into Rails

A static site generator. Provides dozens of templating languages (Haml, Sass, Compass, Slim, CoffeeScript, and more). Makes minification, compression, cache busting, Yaml data (and more) an easy part of your development cycle.

小説家になろうで公開されている小説の管理、及び電子書籍データへの変換を支援します。縦書用に特化されており、横書き用に特化されたWEB小説を違和感なく縦書で読むことが出来るようになります。

A full-featured, mountable analytics dashboard for your Rails app, powered by Ahoy.

Many authors (Michael Feathers, Sandi Metz) have shown that an evaluation of churn vs complexity of files in software projects provide a valuable metric towards code quality. This is another take on the matter, for ruby code, using the `churn` and `flog` projects.